Tata Sky HD & Avermedia H727 not communicating

Hello friends I recently bought Tata Sky HD as well as Avermedia H727. However when i connect it through HDMI interface i am not getting any signal. Composite is working fine.I have a MSI HD 5850 graphics card which supports HDCP as well as Samsung Syncmaster 2033 which also supports HDCP.Would be very helpful if you can suggest me how to Set up the the TV tuner card.