WINXP Pro w/VPN 4.0.2D client on DSL w/PPPoE won't initialize

[jprice]

I have a Cisco 3620 configured to work with W2K clients running Cisco VPN Client 4.0.2D which has been working successfully for over a year. I now have a new user that is running WIN XP Pro SP2 with Cisco VPN client 4.0.2D connected to a Belkin DSL router using PPPoE. When the client attemps to connect it remains on the initializing stage and never connects. I do not see any specific errors in the log. Any help would be appreciated.

[mostiguy]

Do you have an other clients successfully connecting from behind routers doing PAT or NAT?

Is the Belkin DSL router running the latest firmware? Have you tried disabling any IPSec passthrough features on the belkin, as I have seen this conflict with nat traversal implementations.