Need Help Setting Up TP-Link Router with Actiontec Rev. I

Hi everyone, Could someone here help with my issue: I have a TP-Link TP-WDR3600 router that I configured as my primary router with an Actiontec Rev. I, using the primary LAN-to-LAN connection as outlined in the FAQ. Everything works fine, except I am getting a VOD_191 error every time I try to stream anything with Video-On-Demand from Verizon. This seems to be an internet connectivity error, but I am able to get the guide and widgets fine. I think it has to do with my new TP-Link router, since I had this same setup with my old Linksys WRT54GL router running DD-WRT and VOD worked fine. Is there some setting on the TP-Link that I could change and test? The TP-Link is using the latest firmware from TP-Link. I could flash to DD-WRT or OpenWRT, but would like to stay with the TP-Link firmware unless absolutely necessary. BTW, my main router is 192.168.3.1 (which handles all the DHCP) and the Actiontec is 192.168.3.2. The STB is static at 192.168.3.111. I get internet connection when I connect a laptop with an ethernet cable directly to one of the LAN ports on the Actiontec. Thanks!