When i connect my macbookpro to LGTV screen via mini displayport to VGA cable i get half of the screen appears?

When i connect my macbook pro 2.66 NVIDIA GeForce 9600M GT to LGTV screen via mini displayport to VGA cable i get half of the screen appears, i tried to play around with the options but nothing works. it seems like the 9400M graphic card reads the TV not the 9600M.

thanks
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