I need help with a routing problem that's driving me crazy.

1. Windows 2003 VPN Server. Internal IP 10.1.105.5/28. External IP on
the public Internet

2. Multiple VLAN's running on my LAN switches:
VLAN101 = 10.1.106.0/24 for my servers
VLAN102 = 10.1.107.0/26 for Dell DRAC ports and other management ports.
VLAN401 = 10.1.105.36/32 for connections between another switch
VLAN402 = 10.1.105.0/28 for a firewall choke VLAN.

3. An Internal router @ 10.1.105.34/32 which connects to a WAN with
dozens of other networks.

My PPTP clients can connect to the VPN server without a problem but can
only get to nodes on the 10.1.105.0/28 subnet. I'm even using DHCP from
a server on a remote subnet. The VPN server itself is running rip and
can ping everything on the LAN's listed above as well as everything on
the other side of the router mentioned above.

I'm running RIP2 on my Internal router, as well as my LAN switches and
VPN server. I've even tried creating static routes.