Logon Studio Help

I downloaded the logon studio and applied one of the default logons that came with it. When I restarted the computer, the logon screen was black. It showed a message of Parser line 175 ";" not found. I did manage to get back into my desktop and clicked on the default Windows logon screen but it still gives me the black screen and that message. Please help! (I will also uninstall this progam as well)