cannot RDC over VPN

[brainfreeze]

I am trying to connect my home computer to my office computer using our VPN. I am using the Cisco VPN client to make this connection. The computers are Win XP Pro and the router at my house is a Linksys WRT54G v8.0 The VPN will connect fine, but then when i try and Remote Desktop my office computer, it will not connect. The checkbox is selected to allow the remote connection, so i do not know what the problem could be. Any help or ideas?

Thanks,

Brian