I tried enabling Flow Control. It did make a change to the way the DVR-MS file played back - it was less 'choppy'. There is just a little break up, but it pauses every few seconds. I tried changing a few other settings like Transmit/Receive Buffers, and forcing 100MBs Full-Duplex, but they didn't help.
However, I think this shows it is a network problem. To see if this was the case I moved the file to the Public Recorded TV folder on the Vista Media Centre local hard drive and tried to play it on the Extender - Hey presto! It played flawlessy!! So it seems the Extender is having problem accessing the DVR-MS file that is resident on a server, not the VMC.
When I was playing the file on the Extender while it was resident on the server I got the [Network Problem] button on the screen. When I said Yes to running the Network Tuning process it immediately failed, saying it was unable to run at this time. The same thing happens if I run the Network Tuning from the Extender menu option. Does this Network Tuning wizard work for others who are using 100Mbs wired connections?
Geoff.