WiFi Dialing

Hey everyone...new to the 8900 here. This is my first Berry with WiFi, and I absolutely love it!
One problem I'm having though, is when I'm connected to my router, I can't seem to dial numbers when I'm connected on a call.
For example, if I call my bank's 1-800 number and try to enter my account number, the system doesn't seem to register it. It works fine when connected to the regular T-Mobile network.

Is this normal, or is there something wrong with my phone? Is there a way around this?

Thanks in advance for your help :)

This is a new one.

Posted from my CrackBerry at wapforums.crackberry.com

Same problem for me. In about 4 out of 5 attempts it does not work. I suspect the VoIP codec is messing with the dialtones.