VM on Airport Disk

I copied my entire virtual machine folder from my MacBook to my Airport Disk (an external USB drive connected to my Airport Extreme Base Station) to free up space on my internal hard disk. When I try to start my machine, I get an error something like "unable to get drive geometry" and the machine will not start. If I connect my USB Drive directly to my MacBook the machine boots fine. Is is possible to use a virtual machine located on an Airport Disk?

 

That is an interesting idea, although due to the nature of wireless I would be just too scared to try it because of data corruption.