B04155, what is your Blackberry Curve OS version now and what were you upgrading from, if you know? Are you able to connect to the internet and/or receive emails since the upgrade? What error are you receiving when you try to connect using the Mobile Chess?
mobile chess issue

The OS is v.4.5.0.81, I don't recall the previous OS offhand. Even so, I had spotty success with the chess app to begin with, now absoulutely nothing. Everything with the phone works flawlessly except for mobile chess. I get a dialog box asking permission to connect (I say yes), then it just hangs on a blank screen.

Have a look at this thread. There is some APN setting that seems to solve the issue you describe for a lot of Blackberry users.
http://www.chess.com/forum/view/help-support/mobile-chess-on-bb-curve
Hi everyone,
Short and sweet: I updated the OS on my blackberry curve and now I cannot connect to play chess. I've removed, re-installed and check for updates but nothing is working. I upgraded my account specifically to have more moves available since a lot of my chess now is played on the go. Needless to say I'm pretty disappointed at the moment.
Any help would be greatly appreciated. Thanks.