Unable to insert media when adding new products


I was creating new products using MarketPress and i found a weird problem: when i try to insert media using the rich text editor in "Create New" product, it doesnt work. For example, after clicking on "insert into post", i am presented with a blank lightbox ( see my screen shot ). Than nothing happens. And no images are inserted into the new product post.

However inserting media using the rich text editor works when I am trying to create a new post or a new page.

Is that a bug? How do i fix it?