2011 Macbook Pro will not detect Sony Barvia

I have a 15 inch 2011 Mac Book Pro 10.7.4 and am trying to hook it up to a 55 inch Sony Bravia KDL55HX729. I am using a rocketfish mini displayport to HDMI adapter. The problem I am having is that the computer can not detect the TV. There is no arrangements tab when I went into displays through system preferences. If anybody has any tips it would be appreciated.

Did you click the "Detect Displays" button in System Preferences > Displays?:
Bottom-right?

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    Message was edited by: BradleyMG
    Message was edited by: BradleyMG

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