"You are running out of hard disk space" on a Netboot drive

Hey everyone. I'm trying to use parallels in a netbooted, diskless environment for information assurance purposes. Unfortunately, whenever I try to run a Windows XP image, I get the following error:

"You are running out of hard disk space. Free some disk space from the hard disk and click 'Continue'."

The More Details button gives:

"Free space on the drive=//tmp/ necessary to run the virtual machine: 878MB.
Current Free space on the drive(/tmp//): 749MB."

Since I'm netbooting, I'm not sure what I can do to fix this. The server drive that I'm running from has roughly 700 gigs of free space available.

Any assistance would be much appreciated!

Thanks,
Heffenfeffer