Scanning with spiceworks problem(Aastra Phones)

When i try to get the phones scanned, i am having this error come up. We did just move these phones into a new subnet, so im thinking that may be the problem, but i dont know enough to figure this one out...

If anyone could lend a hand on why i am having this error, what it means, or what i can do to try to troubleshoot this i would greatly appreciate it. I have re-scanned the phone, restarted the phone.

Just trying to get the phones inventoried correctly.

They are Aastra 57i phones, all phones are VOIP.

EDIT: i am also having this problem on our current main subnet, i havent had this problem until recently(last month or so)

Thanks guys

Chris