No video or audio

Hi,

I've followed all the guides and using 12.2 Frodo XBMC and MediaPortal 1.4 backend (tv server is hosted on a different PC)

Mediaportal client works fine (allbeit very slow channel changes) whereas when I use default (tsreader) settings on the XBMC Live TV function it appears to change the channel but there is no video or sound.

Can anybody help?