Problem Bitmap for Kingair's panel...

I have buid a kingair cockpit with two screens, one for external view, and the second for the panel with matrox G550 dual head. I try making a new panel withe FS Panel Studio, and the original kingair's panel, with a bitmap 1024x768. My new panel does not take up all my sceen, and the panel's superior border is not on the top of the sceen! I can't do this with mouse, because the gauges are not nice in this case...somebody could help me? thanks very much! :-)) gigibe