GUP clients not updating

I set up a remote site to pull updates from a GUP.  Those machines are not updating when in the office (the laptops appear to pull down updates from Live Update when they are not in the office).  In the event log, I see:

Event ID:  201
Source:  Symantec Endpoint Protection
Category:  Content
Desc:  Content download to the client failed
Moniker: {GUID}
Sequence:  121102020
Source:  Group Update Provider
Size:  750286

So, it looks like the client attempts to download an update from the GUP, given it has information about the update package.  But it isn't happening.  The GUP is a Windows 2003, and the clients are Windows 7.  Wrong update package?  Change to a different GUP?  Or install Live Update Administrator?