One of the suggestions came from here:
http://www.chiefdelphi.com/forums/sh...7&postcount=13
Our team has seen a couple of issues with the mDNS. Most recently we were noticing that when we had two laptops connected, one with the DS (classmate), one connected using LabVIEW (not a classmate). The DS could ping the mDNS name but the LabVIEW machine could not. Manually disconnecting and reconnecting the LabVIEW machine fixed the issue immediately.