Hi,
The reason for your case is the same as the login issue. With the login issue, the ASP.NET authentication module redirects the page to another page (to the login page) when you are not logged in; With your redirection module, the same happens, except that it is not related to login. Basically the page requests a JavaScript file (which is needed by the uploader), but your server serves it another page. So the control is unable to get the JavaScript it needed.
In order to avoid the problem, you have to avoid redirection. There are two ways to do this:
1. Check the documentation of your redirection module and exclude eo_web.ashx;
2. Following steps outlined here to enable physical JavaScript files:
http://www.essentialobjects.com/ViewDoc.aspx?t=InstallationAndDeployment%2fdeploy.htmlOption 1 should be the permanent solution because we use eo_web.ashx to render a number of things, most importantly JavaScript files and built-in images. Option 2 solves the JavaScript files for you, but won't solve anything else. So you will see have problems with other things.
Thanks