Hi Peter,
3.5 is not a requirement for our site - it was just the standard build of our hosting provider: DNN 5 with ASP.NET 3.5 SP1 with IIS6, so therefore we got Ajax 3.5.
I asked them to install AJAX 1.0 (install the ASPAJAXExtSetup.msi) on the server, which they did. After this, my error went away when I navigated to the page that had the instance of DMX on it. The module now appears.
However, now I am trying to activate the Module, but when I click on any of the buttons (web service, web post, manual) nothing happens. Also, when I try to go into settings for the module, the combobox that displays root folder for module and root category appear as grey boxes with the text: {ComponentArt Combobox:: unlicensed version - This version is licensed for single application use only. You can download free trial version here.} so I can't test the functionality.
Not sure what else is broken. Can you give me some guidance on how best to proceed?
Bob