Skin colour on face different.

I'm new, I don't know why I'm having this problem but whatever skin colour I chose didn't change it.. So I pressed random.. It made my face colour a different colour to my skin colour.. Now everytime I try to change the skin colour.. the skin colour of the body changes but the face doesn't. The face just changes to the colour of the hair. It all seems so glitchy. Btw it doesn't appear this way to other people. to other people my skin colour is all the same as the body.

By the way I know its something to do with my graphics or something? But my computer is good.. When I log into SL the display changes..

I am using Duel 512MB Geforce 8800 GT's and Vista 32-bit.