Object moved to here

Problem:

Yesterday I spent about half of the day working on a problem where I was using Thin Upload Pro to upload multiple files to our web server. Everything worked fine in the development environment but when I moved it to test, I received the message "Object moved to here" in the applet.

I found several articles on this, but they seemed to all refer to using the 1.1 .NET framework. This project was using the 2.0 framework.

The applet was showing the page just fine on first load. But when I would drag files in to the applet to upload them (which posted back to the same page) I would get the error.

Solution:

We are using forms authentication with our site and I found that when I gave unauthenticated users rights to the upload page, the error went away. I suspect this is because the applet does not post information the page is expecting to allow the authenticated user to the page. The page itself still has access to the session and verifies the user's credentials, but this had to be done manually.