Hi. I've been working from your tutorial and adapting things and run into a real head scratcher. When I make a datafield readonly it stops working. For example

This works
<asp:BoundField DataField="Job_ID" HeaderText="Job ID" SortExpression="Job_ID" />

This doesn't
<asp:BoundField DataField="Job_ID" ReadOnly="true" HeaderText="Job ID" SortExpression="Job_ID" />

I know this is probably to do with the pop up rather than the calender but any ideas where I'm going wrong!!?

Thanks