Drawing bitmap on a bitmap

I'm having this little problem:
I want to draw a bitmap (32X32) on another bitmap(640X640), The little
bitmap is situated in an imagelist. The big bitmap is situated in a
scrollbox.
When I use this code:

imagelist1.draw(Bitmap1.canvas,(0,0,1);

The little bitmap is always situated about 32 pixels from the top of the big
bitmap. How can I prevent this so that my little bitmap is in the top left
corner of the big bitmap.

Thanx
Best regards
Van Tyghem Sean