ATI 5770 and fs9 problems in Win7?

HiI switched from WinXP to Win7 Ultimate 64 bit.Everything works Ok, except VGA drivers for my ATI 5770. It works normally, but in fs9 in some cases I have a problems.When I'm in fullscreen mode (fs9) and for example I want to pop up for example IVAP panel, it does not come instantlly. First I have 2 sec delay with ghost image. I'm not sure is it enough clear what I mean.With WinXP when I pressed CTRL+F9 for IVAP panel to show I had instant pop up of IVAP.With W7 when I press CTRL+F9 inside Fs9 (full screen) first I have ghost image of previous screen and after 2 sec IVAP shows.Anybody with advice :-)I'm using CAT 10.11.thanksEdin