I am having an issue with a dropdownlist and ValidatorCalloutExtenders. I have a simple page with a table and 2 dropdownlists on the page. One has autopostback=true and upon postback it dynamically populates 2nd dropdownlist. The validation still works after postback but popup error messages no longer appear. First ddl is poulated on page load (if not ispostback)
Why can this be happening? Any input is welcome. Thanks