OK so after migratiuon to the new Be network and setting the modem as per their settings VPI/VCI 0:102, Bridged LLC, Multimode etc, the router now constantly loops through initialising, connecting, getting an IP and then resets.
Pity you never gave chapter and verse on your settings as we might have spotted an error in your setup but throwing in my two pennyworth I would first make sure that you had ticked the box ENABLE.
You don't say if you have a fixed IP since that may mean a different VCI number; I believe 101 is used for fixed IPs and 102 for dynamic.
Multi-PVC channel : Channel 2
Encapsulation: 1483 Bridged IP LLC
If you have a fixed IP, specify as such and enter it; also enter the Gateway IP address.
No need to enter DNS IP addresses, use default IP address and leave unticked RIP And Enable Bridge Mode..