How to solve the problem of nokia 5200?

[Christopher]

I have a Nokia 5200 and when I activate a theme it says "Unable to open. Theme corrupted." I have tried themes that are already on the mobile phone but it says the same thing. I'hve change the memory card and tried to activate about 150 theme... unfortunately... Please can someone help me how to solve da problem???? I'will be very greatful to you!!!!!

[Faraz Khuwaja]

Well To my Experience It Seems LIke a Software Fault ! Reinstalling the Software Can Sort Out Ur problem ! Take Ur Mobile to a Professional MObile Expert !