I'm using a 7100g with Cingular service. I've been using Verichat for BB on it with no problem. All of a sudden when I try to log in to Verichat today, I get the error message "could not open tunnel". I can send and receive emails and PIN messages. I can also access the Cingular Browser and BlackBerry browser with no problem at all. The APN and everything from what I can see is set up properly. I have even tried removing the battery and leaving it out for awhile and replacing it, but I still get the same error message when logging in to Verichat.

Well...I have resolved my own issue. It seems that the APN for Cingular is down and that's why I'm unable to log in to Verichat. For anyone else using Verichat, Ramble IM, or any other such messengers may also have such issues if using Cingular's network.