Custom Tree redirects to logout.aspx when node clicked

I implemented a custom dictionary editor (and moved it into the Translator section) as per this post…

http://www.theoutfield.net/blog/2014/08/moving-the-dictionary-tree-to-a-different-section-in-umbraco

It was working great for a couple of weeks however now when I click on a node, the request is fired off to my EditDictionaryItem.aspx page but I get a 302 response redirecting me to /umbraco/logout.aspx

Any ideas ?

Thanks


This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/70374-custom-tree-redirects-to-logoutaspx-when-node-clicked