One scan and done? Why?

I have been having a problem as of late with scanning computers in our company. When i initially set up the computer that is not in SD+ and do a new scan for it on the domain, it always picks it up and records everything about it. But for some reason after it scans the first time, it never scans again and comes up with the error:

FAILURE : No response received from workstation. Probably the workstation might be switched off or does not exist.

Even tho the workstation is sitting right on my desk with an Internet connection, can ping the server, and has already scanned one time, it always brings up this error. Its only doing it with machines as of late, and have no problem scanning the computers that have been in there awhile at all.

It is a Dell Latitude D820 Laptop, and i had the same problems with a few desktops a few weeks back.

Help Please!

Matt Gill
Back Office Support Systems, Inc.