RadComboBox SelectedIndexChanged only fires when running in Asp.net Development Server

[Jacques]

Hi, 

We're having issues with a ComboBox that won't fire its SelectedIndexChanged event. 

So I started doing some tests by first creating a new dummy page with nothing on it and confirming that the ComboBox does in fact fire it's SelectedIndexChanged event, which it does. This is a page with a RadComboBox, RadGrid, both of which make use of ObjectDataSources to populate their data. The RadGrid relies on a selection in the RadComboBox to populate. 

My project page on the other makes use of nested master pages, with a script manager located in the Base.master. 
The page itself has a number of controls including the RadComboBox and RadGrid. 

Here are the results, which are disturbing to say the least: 
1. Running my test page directly using IIS 7 works fine
2. Running my test page in the Asp.net Development Server (in VS2010) works fine. 
3. Running my project page in the Asp.net Development server works fine. 
4. Running my project page in IIS7 fails. No event firing for SelectedIndexChanged event. 

How on earth is this even remotely possible? 

Regards,
Jacques

[Dimitar Terziev]

Hello Jacques,

Since you experience this problem only when your application is hosted in IIS7 then I believe that it's caused by some configuration issues. Please specify whether there are any java script errors on the page. Also if you could send a live URL it would be helpful.

All the best,
Dimitar Terziev
the Telerik team