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just to comfirm shane, are you using the updated DShowNET i posted and also have you got Interop.TunerLib.dll in the mediaportal base directory?

i am also using the twinhan card and can build the graph fine. i'm not sure why i'm the only one that can get the graph built. i can't find anything specific to my setup in the code.

there is one thing specific...InterVideo Decoders