wireless laptop cannot connect to work pc with remote desktop

I have a desktop (wired using dhcp) and a laptop (wireless using dhcp) at home running win xp pro. At work I have a desktop pc (wired with static ip set) also running xp pro. Both locations are using the linksys befw11s4. I am trying to connect from home to work. Work has a static internet ip address and I've set up a vpn and remote desktop. On the router I enabled the following in both locations: Block WAN Request, Multicast Pass Through, IPSec Pass Through, PPTP Pass Through, MTU. I disabled the following: Remote Management, Remote Upgrade. On the forwarding page I enabled the following ports on the work side only: 1723 tcp & udp, 47 tcp & udp, 500 udp, 3389 tcp.

At home I can connect with the vpn on both machines. On the desktop I can connect with remote desktop after having set the compatibility mode to win 98/me. Before doing that I could only connect once in a great while. On the laptop I cannot connect with remote desktpp even if I change the compatibility. A while back, I had windows 98 on the laptop and I had it working, but slowly it brgan connecting less and less and finally stopped. I thought the upgrade to win xp pro might help but it didn't. The message I currently get is: The client could not connect to the remote computer. Remote connections might not be enabled or the computer might be too busy to accept new connections. It is also possible that network problems are preventing your connection.

Both home machines are set up identically but only the pc connects. I thought it might be my wireless signal strength but I tried connecting with the laptop next to the router and it could not connect. I had a professional look at it but he couldn't get it workinng (he's the one who set the compatibility and got the desktop working.

Thank you for any asistance you can offer.

Tracy