Problem with the style

Hello.
So I installed certain style on the forum, that is the one http://pl.hitskin.com/search-a-skin/new-age-108602.htm.
Unfortunately so he didn't appeal to users of the forum I wanted to change him, but when I did it, a background and colours of this style stayed (font, tables, and so on, and so forth)...
Again I changed the style, but nothing has changed apart from loga and of a few small details. It is so too everyone with time, only restoring the previous style is helping, the fact that I cannot even is worst around to edit of old style because at every change even at the change of the colour appears the one wgrany style; (I don't know what to do, I don't want to change the forum since the ones I already have developed, so whether it is possible somehow to help it?

You can use the founder utilities to restore your forum back before you install the theme

Great thanks, you are remarkable!!!