Thread:Project:Support desk/Display Searchmatches bold

Hey everybody, I use the Vectorskin and want if i'm searching something that the searchmatches are displayed bold. I found the css code .searchmatch { font-weight: bold; } but my Wiki doesn't use this code. If i use firebug the words which are searchmatches, are not marked as searchmatches. What did i miss? Thx for your help!