Admin area not working

Hi,

Can some one help me, today the admin area does not load at all

i keep getting the below error message

Fatal error: Cannot redeclare zen_get_artists_url() (previously declared in /home/content/s/h/a/shahputra/html/shah4208/includes/functions/extra_functions/product_music_functions.php:25) in /home/content/s/h/a/shahputra/html/shah4208/includes/functions/extra_functions/product_music_functions.php.bak on line 34

any help would be just great

Use FTP and check for recently modified dates on your files and start there...
If you did not modify it recently are there any that have been modified?

the site was attacked by the godaddy malware issue ran a script scan issues which removed the malware code and made a bak file of the earlier file, but now when i want to log into the admin area and type url site/shah4208/index.php i get the above message, which files do i check and for what ? your reply would be of great help to me. The site otherwise is working fine.

which files do i check and for what ?
Since you were hacked the only option is to compare ALL of your files to a clean set of the same version that you are running

See:
https://www.zen-cart.com/tutorials/index.php?article=138

And the "CLICK HERE - Recovering from Hacks." Here
http://www.zen-cart.com/forum/forumdisplay.php?f=134