TP2 won't connect via ActiveSync or Diagnostic mode.

[shaggylive]

then it's probably the cable (or connector/ion).
I assume it's still charging? do you get a pop-up (usb storage or activesync) on the phone when you plug it in?

if a new or verified cable doesn't work you can try cleaning the contacts on phone jack. best way to verify a cable is by running an external hdd (usb powered) with one and sustaining read/write for a while.