Hi, We have several BEFSR41 routers installed for users to access the network from home using Cisco VPN client v3.5. The configuration has worked fine with v.3 routers and the firmware version 1.05.00, but it does not work with BEFSR41 v.4 routers. the connection to the VPM client dropps after about 5 seconds of authentication for every v.4 router we have tried whether it be cable or DSL. Any thoughts as to what the issue could be. I have tried adjusting the MTU size and that did not have any effect. Thanks.