Hi all, not sure where to pop this one, be it a VMC problem, a network problem, or a WHS problem.

I recently set up a home server.  It's running great, working as it should.  Backups work, shares are set up, duplication is running.  All is fine there.

I've added shares to VMC for the Videos folder, DVD gallery, and Music library.  I've added these through Windows Media Player as I would if things were stored locally on the HTPC.

The media is showing correctly, and I can run videos, dvds, and music with no problem. There's no lag, no stuttering, no buffering or anything like that.  It runs really well, as though things are on the local drive.

One thing though.  Occasionally when a video ends, and I press the back arrow to go back to the source folder, the VMC freezes completely.  No button presses work on the MS remote, not even Stand-By.  The only thing I can do is bring up the task manager and quit VMC then restart it. 

It's really annoying.  But its not limited to the videos folder.  For example, my gf just finished watching a video and then pressed Live TV.  She was taken to the Live TV feed and tv played, but she couldn't bring up any of the guide options or anything.  Pressing Mute worked, but did not bring up the Mute icon - just muted the PC on and off.  From there no more buttons worked - couldnt' go back, forward, up or down in the mini-guide.  Nothing.  So task manager and quit solved it again.

Could this be related to the WHS is the first question?  Could it be a network issue would be my 2nd question?

I was originally running a 100Mbps network between the HTPC and WHS.  I've since changed that to 1Gbps and the same problem occurs intermittently.  File transfer and viewing confirms that I'm running in 1Gbps, as does the network properties of the LAN connection.

I did notice that when I tried to expand Network from Windows Explorer, it took a hell of a long time to expand and see the rest of the network - including the WHS.  Could this be the fault?  Perhaps Vista is losing sight of the network?

Has anyone had these types of problems?  What did you do to fix it?  

Thanks
G.