Macbook using Moshi HDMI Adaptor

i have a macbook, wanting to connect to tv by way of the HDMI adaptor from Moshi, the pack says audio/video adaptor for macbook .... video works fine but no audio? any suggestions?

so i have a 2007 macbook (black) and saw this thread and heard the same from other people. so i bought the moshi mini displayport to hdmi adapter to try and watch videos (streaming movies and itunes purchases) on my tv. i got the extra cable for sound, as recommended also. However, i cannot even get the picture to show up on my tv. i have my input on the tv to the correct hdmi port and the adapter plugged into what i think is the right firewire port but nothing is showing up on my tv screen.
before i even worry about the sound, i want to make sure the video picture even works, but i keep getting "no signal." any suggestions?

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    Version:1.0 StartHTML:0000000167 EndHTML:0000001953 StartFragment:0000000457 EndFragment:0000001937         
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