Wifi/UMA question

I got my blackberry curve 8320 (t-mobile) a couple of days ago, and when I connected to my home wifi the UMA icon would appear and replace the edge icon at the upper right of the screen. I would then have perfect service at my house (I dont have very good cell reception at home when not connected to wifi) However for the past two days whenever I connect to my home wifi the UMA symbol does not apper, the edge one stays there. And my service stays very poor. I am however able to access the internet with my wifi so I know it is working. How do I get it to reconnect to the UMA? Any help would be greatly appreciated, Im a new blackberry user. Thanks!

Connections / Wifi Options. Menu / Wifi Diagnostics.

Your connection to your networks is likley fine, you should see a successful connections status message.

Scroll down to UMA. Check the connection status.

If you are getting a Not Found status, the problem is most likely tempory and will correct itself soon.