Rush HD - problems viewing this channel only (1 Viewer)

[jonm]

MediaPortal Version: 1.1.0 + SVN
MediaPortal Skin: Blue3wide
Windows Version: Windows 7 Professional
CPU Type: Intel Core2Duo 2.6Ghz
HDD: Samsung 1Tb
Memory: 4Gb DDR
Motherboard: Asus P5E-VM-HDMI
Video Card: Intel G35 on mobo
Video Card Driver:
Sound Card:
Sound Card AC3:
Sound Card Driver:
1. TV Card: Blackgold 6-in-1
1. TV Card Type: DVB-S
1. TV Card Driver:
2. TV Card: Tevii S660
2. TV Card Type: DVB-S2

My setup is working great these days apart from one channel - Rush HD. I can't watch this without stuttering. Does anyone know if this channel is in any way different to any other HD channels? Why would I only have problems with this one channel? Other HD channels e.g. Discovery, Nat Geo etc are fine.

Anyone else watching Rush HD successfully? Any tips appreciated e.g. which logs to check etc.

Thanks,

Jon.