[Zope] Photo problem

Hi all, I am using Photo Product and Imagemagic engine. In ZMI when i am adding an object of type photo and a bmp image i am having a problem. The image is uploaded perfectly which i can see by clicking in the view tab. But in edit page of it no image is shown.Besides this no displays of different sizes are created for it through the imagemagic. I seen the documentation of imagemagic, there it is clearly written that BMP format is supported. Any explantion and solution is most welcome. Thanx in advance, Ashish.