HI!
When you instal Skype for first time and enter yours username and pass, on the screen will shown that Skype detected that you have camera and offers you to use it to make video calls. Just deny that or skip (i cant remember exactly).
If problem persist, go to aplications and find Skype and clear user data then start Skype again.
Thanks for the answer. I didnt know that and i try an older version (2.5 something!!) and it work fine. I will try again with newest version and follow your instructions and we'll see!!