VPN'ed into home router, but can't remote desktop to machine on LAN

I have VPN service running on my Linksys DD-WRT router at home, so I can VPN back into my home network when using unsecured wireless internet on travel. I also have remote desktop port forwarding to my home machine if I want to just remote desktop in without using the VPN. However, often times I will VPN in, then remote desktop to my machine. Lately, I can VPN in, but remote desktop to the machine's NAT'ed address on the local network doesn't work. I used to be able to do it that way and I'm not sure what has changed. The home machine runs Windows 7 and the laptop I use on the road for VPN'ing back in runs Windows XP. Any ideas why after I VPN in to the home network I can't see any other machines on the network anymore? I have a folder shared on the home machine that I'd like to map to my laptop once I've VPN'ed in but it can't see that either.

Any ideas or help would be appreciated.

The home network subnet is 192.168.1.0/24 using DHCP (with the home machine statically keeping it's x.x.x.147 address) and the VPN pool consists of two addresses of 192.168.1.160 and 192.168.1.161. Network sharing and discovery is all turned on for the Win7 home machine, as well as the XP machine.

Bueller?