ddl, autopostback, OnSelectedIndexChanged

[BrendaD]

I have two dropdown lists - the second one populated by the selection in the first.

Everything works perfectly until I add the insert behavior.

The autopostback in the first ddl is set to true BUT it fires the insert behavior instead of the function it is supposed to call:

<script runat="server">
protected void CHUChanged(Object Src, EventArgs E) 
{
	ddlSite.DataBind();
}

</script>

The tag for the ddl is:

<asp:DropDownList ID="ddlCHU" DataSource="<%# dsCHU.DefaultView %>" DataTextField="CHU" DataValueField="pkCHU" runat="server" AutoPostBack="true" OnSelectedIndexChanged="CHUChanged"></asp:DropDownList>

The post back is:

PostBackBind="false"

The SQL for the second ddl is correct as it works when there is no insert behavior on the page.

Can someone point me in the right direction so that I can fix what is wrong and let my users actually finish inputting their data before the page disappears!

TIA, Brenda