BB Curve :: BBM And Other Services Not Working On A WiFi?

My Blackberry is from outside the States (from Panama, where I am from) and I use it solely on WiFi (with the Mobile Network Antenna turned off) when I am in college in the States.I have been doing this since January, when I first got my Blackberry Curve 8900 (Javelin?). I used it solely on WiFi until about May when I returned home for the Summer. During the Summer I used the device mostly with the mobile network (EDGE data).

Then I returned to college this past August and resumed using the Blackberry only with WiFi turned on with no problem. Reconnected to my school's WiFi network, and my home router here without much problems. Continued doing that until last week, when I went home for Fall Break. Used it on EDGE during my time there... then I returned to school, at it just doesn't work anymore...

I got it this past Sunday night, turned the device on, it connected to my home network, downloaded a couple of BBM messages and after a few seconds I guess the Blackberry decided it didn't want to work anymore, and since then I have not been able to get a single working connection from any WiFi network I've tried... rebooted the device, the router, removed the battery, deleted Wifi profiles, switched to Hotspot browsing, back to default, etc... nothing

Internet WORKS in the Blackberry Browser... I can browse the internet, look up stuff on google, etc.. but BBM, Facebook, Gmail, nothing else will work... Repeat: wherever I connect I can browse the internet, but the WiFi logo does not turn white and BBM and other will not work?