Greetings Kevin,

I'vw set the UpdateMode to Always and reviewed the new MM v2.4 Dev Guide. I added the reference to System.Web.Extensions to my web project. I'm still getting the same behavior.

Regards,

E.R.

>E.R,
>
>>Yes, AutoPostBack is set to true on the drop-down list.
>>
>>Yes, the DetailsView is bound to an ObjectDataSource. The ObjectDataSource is using the drop-down list SelectedValue as a parameter passed to Patient.GetPatientById(int patientId) which retuns a List. I've stepped through the code to confirm that the correct PatientEntity is being added to the List
>>
>>Here's the SelectedIndexChanged eventhandler
>> protected void ddlPatients_SelectedIndexChanged(object sender, EventArgs e)
>> {
>> ObjectDataSource1.DataBind();
>> PatientDetailsView.DataBind();
>>
>> }
>
>Did you set the UpdatePanel's UpdateMode to "Always"?
>
>Best Regards,

Regards,

E.R. Gilmore