Stradigos,
Your problem could lay within the image itself. Note, that intitially any pixels in the image of a sprite holding an rgb value of 0,0,0(completely black), will be transparent. So, seeing that you have a white background, your image might look as if it now has white spots or areas upon it, therefore loosing its original idea.
To solve this problem, take a look at the
set sprite command within the DarkBasic Help files. This command allows you to set specific attributes of the sprite, including the ability to turn transparency on and off.

+NanoBrain+