Why?

Intro :
keybords part tabbed for guitar 

eb--------------------------------- 
Bb--------------------------------- 
Gb--9-----7--9--11--9-----7--6----- 
Db-----9---------------9--------7-- 
Ab--------------------------------- 
Eb--------------------------------- 

guitars 

eb--------------------------------- 
Bb--------------------------------- 
Gb--9-----7---------9-----7--6\---- 
Db--9-----7---------9-----7--6\-7\- 
Ab--7-----5---------7-----5--4\-7\- 
Eb------------------------------5\- 

verse same as intro 

3rd and 4th time 

guitar 2 plays like this 

eb--------------------------------- 
Bb--------------------------------- 
Gb---------------------------6\---- 
Db---------------------------6\-7\- 
Ab--7-7-7-7-7-7-7-7-7-7-7-7--4\-7\- 
Eb------------------------------5\- 
   (-----palm mute---------) 

bridge 
(2 times) 
                                       end 
eb------------------------------------|------- 
Bb------------------------------------|------- 
Gb-----------------------7-----7---7--|--7---- 
Db------7-----7---7------7-----7---7--|--7---- 
Ab------7-----7---7--5-5---5-5---5----|--5---- 
Eb--5-5---5-5---5---------------------|------- 
   (----------palm mute-------------) 

chorus 

eb------------------------------------------------------------------------- 
Bb------------------------------------------------------------------------- 
Gb--9----5----7----------------------9---------5------7-------------------- 
Db--9----5----7----------------------9-9-10-12-5--2~~-7--4~~--------------- 
Ab--7----3----5----9~~--5~~--4~~-----7---------3------5------6~~-7~~-9~~--- 
Eb-----------------7~~--3~~--2~~--0---------------------------------------- 

verse 2 

eb--------------------------------- 
Bb--------------------------------- 
Gb--9-----7---------9-----7--6\---- 
Db--9-----7---------9-----7--6\-7\- 
Ab--7-----5---------7-----5--4\-7\- 
Eb------------------------------5\- 

guitar 2 plays like this 

eb--------------------------------- 
Bb--------------------------------- 
Gb---------------------------6\---- 
Db---------------------------6\-7\- 
Ab--7-7-7-7-7-7-7-7-7-7-7-7--4\-7\- 
Eb------------------------------5\- 
   (-----palm mute---------) 

second chorus 
(1st time) 
eb------------------------------------------------------------------------ 
Bb------------------------------------------------------------------------ 
Gb--9----5----7----------------------9---------5------7------------------- 
Db--9----5----7----------------------9-9-10-12-5--2~~-7--4~~-------------- 
Ab--7----3----5----9~~--5~~--4~~-----7---------3------5------6~~-7~~-9~~-- 
Eb-----------------7~~--3~~--2~~--0--------------------------------------- 

(2nd time) 
eb--------------------------------------------------------------------------------------------------- 
Bb--------------------------------------------------------------------------------------------------- 
Gb--9---------5------7---------------------------------------5------7-------------------------------- 
Db--9-9-10-12-5--2~~-7--4~~--------------------------9-10-12-5--2~~-7--4~~--------------5~~-7~~-9~~-- 
Ab--7---------3------5-------9~~--5~~--4~~-------------------3------5------6~~-7~~-9~~--------------- 
Eb---------------------------7~~--3~~--2~~--0-2-3-0-------------------------------------------------- 
                                           (--p.m--) 

solo 

eb----------------------------------------------15^^-15-12------------------------------------------------------------ 
Bb-------------------------------------12-15-12------------15-12------------------------------------------------------ 
Gb-----12-14-14^^>-12-14-12----12-14^^---------------------------14-12----14-12~~------------------------------------- 
Db--14----------------------14-----------------------------------------14---------14-12------------------------------- 
Ab--------------------------------------------------------------------------------------14-12-------12~~-------------- 
Eb--------------------------------------------------------------------------------------------15-12------15-12-10-12-- 

eb----------------------------------------------------------------------------- 
Bb--15^^>-12----------12------------------------------------------------------- 
Gb-----------14-12-14----14~~--14-12~~----------------------------------------- 
Db---------------------------14-------14-12-14-------------------------------0- 
Ab--------------------------------------------12-14-------10----------0-2-3---- 
Eb--------------------------------------------------10-12----12-0-2-3---------- 
                                       (--------easy palm mute----------------) 

  second part 
eb------------------------------12-14-14^-14^-14-12-12------------------------------------------------------------------------------------------------------------------------ 
Bb-----------------15^^-15~~-15------------------------15^^~~-12-12-12~~-15-12-13----121312131213------------------------------------------------------------------- 
Gb--14^^>-12----12----------------------------------------------------------------14------------------------14-121412141214----------------------------------------- 
Db-----------14-----------------------------------------------------------------------------------------------------------------------121412141214-12--------------- 
Ab--------------------------------------------------------------------------------------------------------------------------------------------------------------14-13-12-10~~- 
Eb---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 

eb-----------------------------------------------------------------12------------------12-14-14^-- 
Bb--------------------------------------------------------------12----15-15^^-12-13-15------------ 
Gb--------------------------------12-11-12-14-14^^>-12----12-14----------------------------------- 
Db-----------------------------12----------------------14----------------------------------------- 
Ab-----------14----------14-15-------------------------------------------------------------------- 
Eb--12-14-15----12-14-15-------------------------------------------------------------------------- 

solo rhytm 
                                                 second part 
eb----------------------------------------------|--------------------------------------------------------------------------------------------------- 
Bb----------------------------------------------|--------------------------------------------------------------------------------------------------- 
Gb--5----7-------------7--5----7----4--4--4--4--|--5----7-------------7--5----7--------------------------------------------------------------------- 
Db--5----7----5--4--2--7--5----7----4--4--4--4--|--5----7----5--4--2--7--5----7----------------2-2-4-4-4-5-5-5-4-4-5-5-5-4-4-4-2-2------------------ 
Ab--3----5----5--4--2--5--3----5----2--2--2--2--|--3----5----5--4--2--5--3----5----3-3-3-5-5-5-------------------------------------5-5-5-5-5-5-5-5-- 
Eb------------3--2--0----------------------------------------3--2--0--------------------------------------------------------------------------------