1. From the XMB menu, press the Select button
2. Scroll down to UMD ISO Mode
3. Change the setting to m33 driver - no UMD
4. Press the Select button again to exit the menu
Try uninstalling wow. Then restart somputer and install it. If you still have the problem you might try http://us.blizzard.com/support/index.xml?locale=en_US&gameId=11&rootCategoryId=2316 This is there Technical Support page. you might be able to find the problem in there. If all else false on that link they have a phone number and e-mail that you can talk to someone at blizzard(makers of wow) that might be able to help you further.