FCKEditor only works when published by Visual Studio?

This may seem like a newb question and I searched through the forums for this answer but I couldn't find anything that specifically answered this question so I apologize if it's already been answered.

I cannot get the ASP version of FCKEditor to work unless I view the site I am using it on through the File -> View in Browser option in Visual Studio. I have already compiled the site once with the editor. When I use, File->View in Browser and Visual Studio publishes my site at localhost:[some random port], the editor shows up fine. When I try to access the site directly through localhost/mysite, I get:

Parser Error Message: Could not load file or assembly 'FredCK.FCKeditorV2' or one of its dependencies. The system cannot find the file specified.

When I look under Administrative Tools->IIS, the site is listed there with all of my other sites. If I remove the references to FCKEditor, the site is completely accessible through localhost/mysite. Is there something I need to do to have it always work? I tried it on a test site too with just the editor and got the same results. Works fine when viewed directly through VS, not when directly accessed through localhost/mysite.

The FCKEditor DLL file is correctly placed in the /bin folder in the root directory of the site and the basepath is correctly set to the right folder (or so I would assume, since like I said, it's working when viewed through VS)

Any ideas on what I could be doing wrong?