Hi nana,
Do you have the latest update installed? Check
here.
Does the shortcut on your desktop point to the .exe file of the latest update?
Are your graphics card driver updated?
Do you have the newest version of DirectX?
Have you scanned your computer for virus, addware and spyware recently?
If the answer to all these questions is "yes" - then I have no idea
I hope you get it solved. Wonderland withdrawal is not a joke
Mette