Change the bitmap Color

i want to change the color of a bitmap that i hav in the cdr 11.

1st i draw a circle, then fill any color. then i turn that circle to bitmap by click the option "Covert to Bitmap" as RGB with 300dpi. Then i select that image, then i go to " Bitmap - Creative - Scatter". Now the image is show with edges scattered. After all these ladder i want to change the color of that image by right click on mouse from the color palatte. someone says, go back and change the color and do all these ladder. Its very difficult. so please anyone tell me about this. i had seen this thing when i went to a printing firm near by.

thanks

mkumarpc