[Koha] ERROR 500

Hello.. I have installed koha on windows 1.2.3 but I have a problem to update Record.This are the error: Server error! The server encountered an internal error and was unable to complete your request. Error message: Premature end of script headers: opac-userupdate.pl If you think this is a server error, please contact the webmaster. Error 500 Anybody can help me? _________________________________________________________________ Download ringtones, logos and picture messages from MSN Malaysia http://www.msn.com.my/mobile/ringtones/default.asp