callabration problems

had my plasma for a little over a month now (pannasonic st30) , put the "life" bluray disk in this morning as i want to now callabrate it after the initial runnning in of 200 hours
does the brightness perfect , the sharpness perfect, the colour perfect but i cannot get it too do the contrast perfect.
i am trying to grey out the letter A and just let the C appear but no ammount of adjustments make this happen .
just cannot remove the A from the screen.

any ideas ? ?

p.s i do not have any of the extra settings turned on like c.a.t.s or colour boost (cool,normal,hot) so i dont know why it wont let me get the contrast perfect.

thanks daniel
 

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