I can't get my Treo 180 to dial my ISP with AT&T Wireless. (I've tried a couple different ISPs.) When I try to connect I get this error message: "Error: Network busy, wrong dial-in number, or data service not enabled. (0x1102)".

Besides AT&T, I have a VoiceStream SIM, and when I put the VS SIM card in my Treo, it will connect.

I used to be able to dial up my ISP on AT&T without any problem, but now --for some reason I can't figure out-- I can no longer use my 180 to connect to an ISP.

Does anyone know how to fix this problem?