Toshiba 46xv640u lcd audio problems

I have been trying to get the audio settings set up but am having problems. I have run an HDMI cable from my PS3 to my Toshiba LCD and am receiving sound but not all channels are coming across. Dialog is missing.
The movie is Dolby Digital audio 5.1 channel AC-3.
I been through and through the manual but cant seem to get the settings right. There are some settings in audio setup that are greyed out and not available to adjust. 
In audio setup for example the following choices are available:
PC audio: yes/no
HDMI audio (if yes for PC audio is selected then the default choice for HDMI audio is digital) ( if no is selected for PC audio then I can select either auto/digital/analog)
MTS is greyed out so I cant adjust
Dolby Digital dynamic range is greyed out
Man this has me pulling my hair out. Anybody ever run into this?
I'm wondering if it's my PS3 settings but this PS3 has worked with other equipment without problems, I just moved it to this TV and I cant get the right sound so I dont know what to do.
It shouldnt be this difficult

You would think that maybe a Toshiba rep would visit here and answer questions. I cant imagine I'm the only person who has ever had this problem. Chirp chirp chirp 

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