Sony Ericsson T62u

Has anyone gotten the T62u to receive a data call correctly? I can get a PC or router for that matter to dial out with the T62u to an ISP or another data network just fine. But when I try to dial-in the phone answers as a voice call not a data. I have changed Next Call to Data under the Call Manager section but it doesn't work. Yes, I have power cycled the phone too. The manual says the phone will not handle the data call by itself but instead notify the "application" (I have tried many dialer products here) that there is an incoming call. Yet it never does. Just answers as a voice call, generates no modem tones, than hangs up after 40 seconds. Can't get the Fax to work either. Any thoughts?😕