then try to restore back admin cp to default name and see if this is the cause to your problem!
go to images folder in your root directory of vbulletin
then search the name of your theme name and in the your theme folder u will see a .xml file upload it in the style VIA admin panel of vbulletin
then
all the folders (ratings,avatars,buttons) etc are must be in the root directory of that theme folder
for example
in my case my theme is located in the HEXCELL folder
then all its sub folders located in the root directory of the HEXCELL folder
i think this will work
It is skin/theme related