MDP to HDMI no audio!

I have a 32" Insignia TV (from about 3-4 years ago) and an early 2011 MBP that I have recently bought. I purchased a MDP to HDMI (with audio support) to connect my computer to my television.

This is the cable I bought:
http://store.apple.com/us/product/H4637ZM/A?mco=MTY3ODQ5OTY

I was able to configure my television to HDMI. However, only video streams through my television. Right now I am using Mirror mode to display my computer on the external screen. I have already gone into sound settings and changed the output to HDMI, but to no avail. It also says that "the selected device has no output controls."

Does anybody have any advice for me? I'd really like this to work :/

anybody? I still can't find any solution :/

nope, no luck with youtube videos. I don't think it's the type of audio that is the problem

bump

These are my only audio setting on my TV:

-MTS: Stereo, SAP, or Mono
-SPDIF Type: Off, PCM, or Doby Digital
-Audio Language: English, French, Spanish
-Speaker: On, Off
-Audio Out: Fixed, Variable

I tried Right Clicking HDMI under the audio midi settings, and I was given the choice to configure speakers. Seems to not really do anything though.