thanks for your attention frist.
i have dotnetnuke 6.x installed on my pc .
i install new skins using Admin >> extentions >> manage >> install extention wizard , and install skins and containers seperatly According the instruction on Dotnetnuke website.
but when i install new skin, skins only load on skins page , and i cant see any part of new sking on other pages of my website . i checked all check boxes on skin editor page such as Host , site , Web site and admin .
it seems somethings not works properly on my system but i cant find the reason, how can i find it ?