I just installed the IPB module and everythings in the right place. but i keep having this error everytime i go to any page in the site

the error
Fatal error: Call to undefined function: activate() in /home/www/thesite.com/include/common.php on line 55
heres line 55
$xoopsErrorHandler->activate(true);

but when i replace common.php with the one that came with XOOPS the error goes away but than no one can log into the fourms...

heres the surrouding code
// ############## Activate error handler ##############
include_once XOOPS_ROOT_PATH . '/class/errorhandler.php';
$xoopsErrorHandler =& XoopsErrorHandler::Instance();
// Turn on error handler by default (until config value obtained from DB)
$xoopsErrorHandler->activate(true);

thanks so much for the help

Your posting lacks version info on XOOPS and the module.

Did you also post at the forum on http://bbpixel.com? (recommended)