Problem Dragging and Dropping Files

Well, I got my connection problem solved but now I'm unable to drag and drop my files from my local browser window to my web server window. As I am dragging I can see the icon for the file moving with the cursor but when I let go of the mouse button the icon disappears and I get a "Transfer failed" message. I have the same problem if I try to drag the file into the Transfer Queue. Any ideas?