Wifi Connectivity problem with WM8650, please help!!!

[lakost]

I am writing this in sheer desperation. I was using my tablet for the last month and it was working fine. I had downloaded some basic apps but my favorite was nook. All of a sudden this weekend, it stopped recognizing my wifi in any app. It recongizes the wifi to surf the web or get email, but within an app, the wifi is not recognized. I had the nook app which I downloaded from getjar and it was working perfectly, then it stopped syncing. So I logged out of the app and tried to log back in. When I logged back in I get the message "No connectivity". I thought it was just that app, but now I can't download any apps from Amazon app store and I tried to login into other apps and I get a similar message. My surfing is fine though. I tried it with my wifi at home and at work, so I know it isn't the wifi, it has to be the tablet.