I am attempting to connect my MacBook (about two years old) to my television. I have connected to the mini DVi port using a mini DVi to HDMI adapter then connected the HDMI cable to the HDMI input in the television. I am now getting the screen saver showing on the television (so it seems that the connections working) but none of the screen icons or any other video functions are coming through. Any ideas? Do I need to install any additional video drivers?