XP Routing Setup

I'm having trouble setting up routing on an XPP box. What I will be doing is
setting up an XPP machine and a printer/scanner at a remote location. The
computer will connect to the office via vpn software through an internet
connection. The user will scan paperwork and email the softcopy back to the
office. The printer/scanner has the "scan to email option", using its
ethernet port. I plan to use the office Exchange server as the smtp engine
for this (it's also the destination of the emails). Therefore I want to
connect the scanner/printer to the XP box to use the vpn connection.

At the office, I have set up a lab to work through the basic configuration.
The XPP box is connected to the 192.168.215/24 office network. I installed
a second NIC, settings are:
IP: 172.17.10.1
Mask: 255.255.255.0
I enabled IP Forwarding (KB315236)
A Win2k machine simulates the printer/scanner. It's NIC settings:
IP: 172.17.10.2
Mask: 255.255.255.0
Gateway: 172.17.10.1

A crossover cable directly connects the two machines. Both can ping each
other, but the 2k box cannot ping the office network. Am I still missing
something here? How can I troubleshoot this? Below is the routing for the
XPP.

U:\>route print
=====================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 10 4b 6b 9c d9 ...... 3Com EtherLink XL 10/100 PCI TX NIC
(3C905B-TX)
- Packet Scheduler Miniport
0x3 ...00 0d 60 4c 2f 5b ...... Intel(R) PRO/100 VE Network Connection -
Packet
Scheduler Miniport
=====================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.215.2 192.168.215.14 20
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
172.17.10.0 255.255.255.0 172.17.10.1 172.17.10.1 20
172.17.10.1 255.255.255.255 127.0.0.1 127.0.0.1 20
172.17.255.255 255.255.255.255 172.17.10.1 172.17.10.1 20
192.168.215.0 255.255.255.0 192.168.215.14 192.168.215.14 20
192.168.215.14 255.255.255.255 127.0.0.1 127.0.0.1 20
192.168.215.255 255.255.255.255 192.168.215.14 192.168.215.14 20
224.0.0.0 240.0.0.0 172.17.10.1 172.17.10.1 20
224.0.0.0 240.0.0.0 192.168.215.14 192.168.215.14 20
255.255.255.255 255.255.255.255 172.17.10.1 172.17.10.1 1
255.255.255.255 255.255.255.255 192.168.215.14 192.168.215.14 1
Default Gateway: 192.168.215.2
=====================================================
Persistent Routes:
None

Thanks!