Drawimage wont work on some PC's

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   Hello,

My program creates a datasheet (a pdf that is) on that datasheet there is a logo. 

For now I pickup the logo from a file (c:\'test.bmp'). (The final code will load the image from the resource of the exe).

I use the following code to show my picture

  bitMap.LoadFromResourceName(HInstance, name);

  bitmap.Transparent := True;

  bitmap.SaveTostream(bmpstream);

  r.left := x_gdu_0;

  r.right := trunc(bitmap.width * scale / dx);

  r.bottom := y_gdu_0;

  r.top := r.bottom - trunc(bitmap.height * scale / dy);

//  qp.AddImageFromStream(bmpstream, 0);

  qp.AddImageFromFile('c:\test.bmp',0);

  if qp.drawimage(r.left, r.top, r.right - r.left, r.Bottom - r.Top) = 0 then showmessage('error');

On my own PC (win XP) everything works fine and I have a logo in the upper left corner. When I use the same executable on a other machine I don't get any error's but there is no logo (perhaps it's invisible or something). 

How to solve this