I'm working with Nevron's print preview dialog and faced with very strange behavior of this dialog window. When I display this dialog box I see a green frame around it and strange header style (see attachment). So question is: HOW TO RID OF THAT, AND SET STANDARD WINDOWS STYLE?

It can be reproduced on next OS's:
- Windows 7 only if you are using Basic or High Contrast Themes
- Windows Server 2003
- Maybe others...

I tried next code, but it didn't help:
NSkinManager.Instance.Skin = null;
NUIManager.Palette.Scheme = ColorScheme.WindowsDefault;
printManager.ShowPrintPreview();

Please HELP!!!