Using a DropDownList, RadioButtonList, CheckBoxList, or other similar control as a trigger of an Update Panel (rather than in the Update Panel itself) will cause the initial value not to fire a SelectedIndexChanged event.

In a previous blog I had posted a document to help developers get started implementing their own provider. This video is aimed at helping those who have had trouble getting their environments setup correctly and issues with the web.config file. I am working on a second video that will walk through modifications required in the code. Coming soon!

http://www.engagemodules.com/Support/Tutorials/tabid/74/Default.aspx

Please post any questions or comments at:

http://www.engagemodules.com/Support/Forums/tabid/57/forumid/4/scope/threads/Default.aspx

See previous blog post here