Thread:Project:Support desk/common.css seems to have no effect on media wiki

Hi! I migrated a media wiki from one server to another. Everything worked fine, but the common.css. The page is still the same like in the original wiki. To test the common.css I've added a line like this: content:" bla "; } but no effect.
 * 1) content:before {

I've added also $wgUseSiteCss = true; in LocalSettings -> still no success

Please help me.

regards, Janek!

MediaWiki 	1.16.0 PHP 	5.3.4 (apache2handler) MySQL 	5.0.91-log