PPCGeeks - Help! How to pair Diamond with Tomtom 720

I need to set up the data service between Diamond and Tomtom 720. I am using a Sprint CDMA Diamond with stock rom. The Tomtom has installed the latest update.

I downloaded some cab to enable the bluetooth DUN. But I am not sure if it works. Is there any way I can tell?

The Tomtom can find Dimond has wireless data. I tried the following as manual set up in Tomtom. But they all failed.

Access point name: blank or Sprint PCS or Sprint PCS Vision
User name: blank or XXXX@sprintpcs.com (got it from sprint)
Password: blank or XXXXXXX (got it from sprint)
Dial number: #777
Script: blank

Any suggestion? Thanks a lot.