I have a 2811 that I just installed a HWIC-1FE in, and the IOS wouldn't identify. Cisco had me install IOS 12.4.11-XJ4 and this identified the WIC, but broke VPN access. The 2811 is configured with the two internal FE interfaces going to an ISP and the internal network. The 1FE is to connect to a new ISP. If I revert back to the previous IOS; VPN works again, but the WIC is not identified. I have also tried a newer IOS 12.4.15T1 that Cisco recommended to try, and I lost all Internet connectivity. Has anyone configured a 1FE in a 2811 before?