you can't have your default gateway going through two devices. try this:
route | grep default
How many results come up? If there is more than one and they have different Ifaces, that's gonna be a problem.
Also, chances are your wireless card isn't going to be recognized by YaST. You're just gonna have to get your hands dirty and use either a native driver or ndiswrapper to set it up. Search the web for what you need to do for that specific card.