Digital Blue files and WMP11

[Andyjbee]

Ok here's a strange one. If I export a video file from Digital Blue into My Docs on local machine WMP plays the file fine, if I copy and paste the same file onto the network share then WMP just shows the visualisation stuff. It's not a permissions issue, I created a share with full control. If I open up mplayer2.exe it's fine, something tells me it's a codec issue but why would it play fine from local machine. How do I tell WMP 11 to play these files.?????