Double-check all the usual suspects ( below ). Triple check that your regedit changes took and were entered properly.
Review this note - which I think is older since it mentions Server 2003 - toward the end is
@Jim Woodhead recommendation for settings. Again, this is an older note of mine so take it for what it's worth. I think the REGEDIT issue persists so I would definitely verify that change.
https://www.evernote.com/l/AAGH81S-BVlHXrlcdUpM2MtPiTVPER3nAQQWhat port number are you running on? Could it be some type of conflict with the port? I haven't seen this in quite some time but years ago there used to be problems with some backup software that would port conflict.
Anti-virus exclusions
------------------------------
Wayne Schulz - Schulz Consulting - 860-516-8990
------------------------------