Skins don't install

[superunknown]

I am using Firefox browser and they still dont install properly. After download the skins, I can see them in the Winamp "Installed skins" list, but they appear as the default skin when I click on them.

This happened only since last month. All the skins I installed before that time still work fine. Only the skins I downloaded since last month dont work.

I can see their extensions as wsz, so the extensions seem to be fine.