Problem: Bibliography and Footnotes are not equal in Word 2007 (Vista)

I have a selfmade outputstyle, which was working allright all the time. The last days I noticed a strange problem, which occurs with all outputstyles, not only with my selfmade style.

I have a lot of electronic references/webpages in my references. The Outputstyle for the bibliography and the footnotes shall be equal. But in the footnotes I always get only the generic style, but not my style or any other. In the bibliography everything works fine. The strange thing is this only occurs with the reference “web”, all other are working allright.

Has anyone an idea how to fix this problem?