Need to update data from dropdown list in DetailsView

I have a DetailsView with a dropdown list. When I select a value from the ddl, the value I selected won't update to the stored procedure. The sproc works fine and I can update other fields. It's just the ddl that won't send the selected value to the sproc.

The below snippet shows the abbreviated code. Thanks.

<asp:DetailsView ID="dvStores" runat="server" AutoGenerateRows="False" BackColor="LightGoldenrodYellow"
	BorderColor="Tan" BorderWidth="1px" CellPadding="2" DataSourceID="GetStoreDetail" ForeColor="Black"
	GridLines="None" Height="50px" CssClass="normal" Width="210px">
 
<asp:TemplateField HeaderText="State" SortExpression="StateLong">
			<EditItemTemplate>
				<asp:DropDownList ID="ddlState" runat="server" DataSourceID="GetStateListShort" DataTextField="StateLong"
					DataValueField="StateId" SelectedValue='<%# Eval("StateID") %>'>
				</asp:DropDownList>
			</EditItemTemplate>
			<InsertItemTemplate>
				<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("StateLong") %>'></asp:TextBox>
			</InsertItemTemplate>
			<ItemTemplate>
				<asp:Label ID="Label1" runat="server" Text='<%# Bind("StateLong") %>'></asp:Label>
			</ItemTemplate>
		</asp:TemplateField>
 
</asp:DetailsView>
 
 
 
 
<asp:SqlDataSource ID="GetStoreDetail" runat="server" ConnectionString="<%$ ConnectionStrings:SiteSqlServer %>"
	SelectCommand="KScoop_GetStoreDetail" SelectCommandType="StoredProcedure" UpdateCommand="KScoop_UpdateStore" UpdateCommandType="StoredProcedure">
	<SelectParameters>
		<asp:ControlParameter ControlID="grdStores" DefaultValue="-1" Name="StoreId" PropertyName="SelectedValue"
			Type="Int16" Size="1" />
	</SelectParameters>
	
	<UpdateParameters>
		
		
		<asp:ControlParameter  ControlID="grdStores"  Name="StateId" PropertyName="SelectedValue"   Type="Int16" />
		
 
	</UpdateParameters>
</asp:SqlDataSource>

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