Sick of your diamond connecting to the data connection and running up charges at $0.03/kb ?
I was looking around in the registry and found this:
[HKEY_LOCAL_MACHINE\Comm\ConnMgr\Providers\{7C4B7A3 8-5FF7-4bc1-80F6-5DA7870BB1AA}\Connections\Phone as Modem "Enabled"=1
Change the enabled=1 to enabled=0.
It's been working for me!