UBB.Developers Forums UBB.classic V6 MultiHack Mods [6.0x] Who's Online 4.0.0 [Finished]

I just tried to upgrade and I got the following error when I try to configure it in the Control Panel:

Content-type: text/html
Software error:
Undefined subroutine &main::WhosOnlineSettings called at /home/sites/home/web/cgi-bin/cp.cgi line 553.
For help, please send mail to the webmaster (admin), giving this error message and the time and date of the error.


Also on the Board, when I click on Who's Online it doesn't show anyone??

thanks