Strange recently (since installing Chatteremail), my phone frequently stalls when connecting to the data network?

It just sort of "locks up" with that little window "Service Connection Progress....Connecting to PCS Vision"

Cancelling and restarting doesn't help.....the only thing that "fixes" it is to turn the phone/radio off and back on, then it connects to the data network with no problem?

I have two IMAP mail accts and a POP account being polled for mail?