Form Icon Background

I have set an image of type .ico to my form.The size is 24x24.It does not have any background,in the sense its transparent.But when my form gets loaded,it gets a black brackground.I have not added this icon into any imagelist.
i am just doing
me.icon=app.path & ("someicon.ico")
in the form load.
how can this black bkgrd be removed ,so that my icon looks same in the form load as it looks when viewed in any image viewer.
Plzz help.. :(

Moved from FAQ forum

The Icon should be 16x16

ic ould be because its being squeezed to that size its loosing transparency.

what app did u use to create it?

Aslo, 32 bit XP icons are not supported that way.