Grand GWB-4000

Arcata, CA(Zone 9b)

I have an Grand GWB-4000 Ultimate Wireless PC/MAC DV to TV converter w/2.4 Ghz that is attached to my computer. When I watch movies on the computer it shows up on my TV in the other room. Since I upgraded to windows 7, I had problems. It runs alright on the old XP system (slow) but I found out I had to lower my display down to get a picture on win7. My big problem is the sound. Very low. Does anyone have this product? I have read everything I could find on the web. I have e-mailed the manufacture, but no answer and its been 3 weeks. I resent the e-mail again 1 week ago, still no communication.

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