Error 500 After Host "secured Server"

Our host offers a server server package which we installed after our wordpress install was hacked. After the "securing" we get an error 500 when trying to log into the admin section. I changed the file permissions to 755 for the admin php file and that did nothing. They disable the following functions when the secured the server:

disable_functions = show_source,system,shell_exec,passthru,exec,phpinfo,popen,proc_open,allow_url_fopen,ini_set

They re-enabled those functions and I am now able to access the admin. However, they don't know which service was causing the error. Does anyone have any insight on which disabled service would cause cs carts admin page to error 500?