Forum Facebook works with default style/theme but not with custome style/theme
 

The designer uploaded the style to his test forum and facebook works fine with it.

He emailed me the same exact files, I uploaded, and the style/theme looks great but facebook connect button doesnt do anything. (yes Im logged out of vb and logged into fb)

When I switch back to the default style/theme, everything works perfectly.

So the same set of files works OK on the designer's test forum, but not on mine.

I'm stumped! Any suggestions? (btw I dont have access to the server error logs)