Blank pop-up in Internet Explorer

I am using image assist and FCKEditor. It works great in Firefox 3. However when I try to use image assist in IE7, it pops up a blank popup with the error below:

Line: 13
Char: 1
Error: Object expected
Code: 0
URL: http://imvd.ryangathmann.com/img_assist/load/fckeditor?textarea=body

Any ideas? Let me know what other information you might need.

Thanks in advanced.