Nito Network Mount Failed

I am trying to connect my appletv via a wired 100mb ethernet connection to my home computer using Nito TV. I have followed the instructions on the ATV flash wiki VERBATIM. My home/office computer is running XPSP3. I have established a password on the administrator account on my home/office computer as previously advised and have put everything into the mount section under Network in Nito. I am getting the following error-

Network Mount Failed!
mount_Smbfs: tree connect phase failed:
sys err = Cannot allocate memory