Thread:Extension talk:S5SlideShow/bug: call user func ?

Hi folks,

first i want to say: great stuff, never .ppt-hell again;) But:

it worked for me only with require_once( "$IP/extensions/S5SlideShow/S5SlideShow.php" ); instead with require_once "/extensions/S5SlideShow/S5SlideShow.php";

and now I got this Warning call_user_func(S5SlideShowHooks::Setup) [function.call-user-func]: Unable to call S5SlideShowHooks::Setup in /var/www/mediawiki-1.15.4/w/includes/Setup.php on line 310

any idea? thx and greetz