Colors in TImage


I use a TImage to display a Bitmap using the method
The Bitmap I load before with bitmap->LoadFromFile(...) is a grayscaled
Bitmap. Now I want to draw a line on the Canvas of the Image or the
Bitmap with a other color (clRed).
In CB1 this works fine, but what I get in CB3 is a colour from the
grayscaled Palette.
What has changed in CB3 or what I have to do to solve this problem?

Thanks for help.

Andreas Meier