Thread:Project:Support desk/SRF iCalendar problem

Hello, I'm new around mediawiki, and I have had a few problems upgrading the mediawiki of the company. Right now, I just installed MediaWiki 1.18.2, and loaded the databases. I also tranfered the data, images, and doc from the old wiki to the new one, and checked extensions the old wiki had, downloaded the new versions of those and copied them to the extensions folder. Now the wiki page apears blank, and when checking the error log i get this message:

PHP Fatal error: Class 'SMWResultPrinter' not found in /var/www/mediawiki/extensions/SemanticResultFormats/iCalendar/SRF_iCalendar.php on line 17

I have already tried removing certain extensions but to no results yet. The extensions I downloaded were: FCKeditor, SemanticForms, SemanticInternalObjects, SemanticResultsFormats, SemanticMediaWiki, GoogleCalendar, PasswordReset, and Winter. Could you guys please give me a hand with this?