Iphone OrbLive app wont play live tv "Failed to play this media"

hey guys, i hope i put this in the right section..i got the orblive app for my iphone 3g to stream video/audio/tv from my pc. I downloaded orb on my pc and i am able to successfully stream audio/video/documents from my pc to my iphone...the only thing that doesn't work is the live tv..i see all the channels and what is playing on the channel but no video.. when i tap the channel it says "Error. Failed to play this media. " I have a tv tuner card hooked up and it plays tv through media center on my computer fine..the orb program on my computer even recognizes the tuner card and channels but for some reason my iphone isnt able to play them..I dont think its a port forwarding problem because i am able to stream videos and music etc..please help