Main Page forum_Post display wont display

I made a change to this pages rss feed to display 6 instead of 4 and now it just keeps displaying a rotating wheel as if its searching for the data and cannot find it. I checked the other settings to see if accidently i changed anything and it looks to be intack/correct .    any ideas welcome 

When i click on the Forums from the top menu i get this   Fatal error: Class 'Mistake' not found in /home/ottawali/public_html/menchini.ca/modules/boonex/forum/classes/en/BxDb.php on line 9"

Issue Resolved with the help from Moderator " rhimpr " he also earned the Cancer Society a donation.

Thanks rhimpr