Can't seem to figure this one out; any help would be appreciated.

We have a network running Windows 2000 servers. We're putting in some Linksys RV042 routers (so some IPs have changed) and creating VPNs. The servers using the newly installed routers are able to talk back and forth, but the problem is with 2 particular servers not being able to communicate, kind of...

We've successfully established a VPN tunnel between 2 servers (let's call them Server A and Server B) but they can't ping each other. I can log into Server A and remotely login to Server C, D, E, etc. and remotely login from that server to Server B, and vice versa (B to another, another to A). When I do a tracert from Server A to Server B using the server's IP address, nothing. Doesn't even hit its own gateway. When I try tracert from Server B to Server A, it hits its gateway (internal address) and the router's default gateway (external address) then cops out.

I'm thinking there's an issue with Server A's settings, probably firewall/permissions or something. Any ideas or suggestions?