Cisco Routers :: RVS4000 With Verizon DSL / Westell 7500?

We have an existing RVS4000 that has been coexisting peacefully with an ISP managed Netopia 2241N. That configuration has worked fine for over a year.The company is switching to using Verizon DSL instead. Verizon sent a Westell Model 7500 router. The router works fine with a standalone PC but, in none of the modes can I get internet connectivity through the Westell to the RVS4000. I can't ping the gateway or the DNS addresses and there is zero activity. I've tried the default "routed bridge" settings on the modem as well as the "bridge" settings. I can only get these working directly on a PC but as soon as I put the RVS4000 in between nothing seems to be getting through. I've tried turning off all Firewall features in both devices but hasn't worked.
 
There is a single, static IP. What specific modes and settings should be in the RVS4000 to communicate with the Westell Model 7500 in "bridge" mode?What adjustments should be made to the Westell to pass along the necessary ports that will be needed?Even though it is a business account, Verizon refuses any assistance beyond getting the unit functioning with a single computer and, if requested, setting their Westell to "bridge" mode.