Pro Skin / Basic Skin

Hello, I have the Pro version of Unity And it won’t let me use the Pro gui skin. It says Pro Skin (PRO ONLY). It wont let me use it but i have pro. Has anyone else had this problem? if so can You help?

Thanks In Advance!

launch unity, go to the first menu, select ABOUT UNITY,

look where the arrow indicates in this image:

[8890-screen+shot+2013-03-13+at+10.55.04.png|8890]

what do you see ?