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ADV7850 can't display correctly

Hi,

    This is Michael from DIVA and now we utilize ADV7850 to develop a ADC to HDMI Box (VGA, YPbPr, S-Vide0, CVBS input), and we have designed our board and follow our distributer to fill the register but we can't display our image correctly. Phenomenon as below:

1. In some timing, we can't see the far left 1 pixel but if we move the picture to right, this pixel will appear but the far right 1 pixel will disappear.

2 in some timing,  we can't see the top 1 pixel but if we move the picture to downward, this pixel will appear but the far bottom 1 pixel will disappear.

Could you help us which register we can ajust to correct this issue.

Thanks.

Michael