yes, make sure the required port are opened and not blocked by firewall
one quirk I’ve noticed in past with hanewin installer
nfs depends on sunrpc portmapper
it installs, but I’ve seen some installs where it does not get set to autostart in windows on reboot
if that’s the case go to services, and change it to autostart at boot
besides that entering invalid option in the exports file can also cause problems
but all this is pretty well documented in hanewin guide
http://www.hanewin.net/nfs-e.htm
also lots of docs on google
http://mrlazy.wordpress.com/2009/08/04/how-to-setup-nfs-shares-on-wd-tv-using-hanewin/
this one is massively old created for other device, so you only need to do the windows set up bits
