My fault. The trust level in web.config was set to Full but since I was editing the file in notepad I failed to notice that it was commented out.   All dialogs are working just fine now. Thanks for the help Adam.

Yes I did. It was my fault. The trust level in web.config was set to Full but since I was editing the file in notepad I failed to notice that it was commented out.   Needed the weekend to clear my head. I will reply to the original post as well for anyone who may follow it.

I just got the trial version working and evaluating document uploads. It does not look like the editor takes into account any of the view/write permissions setup in the DNN File Manager. I created a user with only write permission in 1 sub-folder and view in a few other but when I click on the 'Downloadable Files' icon I can see all folders within ...

No. I have it setup on my local workstation (Windows XP).

That took care of it. Thanks. I assume I can place the CuteEditorTemp folder anywhere as long as I change the value in web.config as well?   Unfortunately now the dialog is opening but I am getting a security exception. I changed the trust level to Full but am still getting the error. Any ideas?  

I have seen this problem posted a few times in this forum but have not seen a solution. I just downloaded a trial version od CE5 (version 5.2). I want to replace FTB3 on DotNetNuke (version 3.1.1). Its seems to install OK and I can bring up the editor. When I click on a toolbar button that needs to open a dialog box, such as 'Insert Image', ...