When I try to reference the selected row's datakey (single row selection only), I get the following error:{"Object reference not set to an instance of an object."}.

When I put a break point on the following line of code I can drill down and see the store value in the datakey: Session["rec_ssn"] = e.CurrentSelectedRows[0].DataKey[0];

Here is my grid:

<ig:WebDataGrid ID="dgSearchGrid" DataKeyFields="ssn" runat="server" Height="400px" Width="100%" AutoGenerateColumns="False" OnPageIndexChanged="dgSearchGrid_PageIndexChanged" OnColumnResized="dgSearchGrid_ColumnResized" OnColumnSorted="dgSearchGrid_ColumnSorted" OnRowSelectionChanged="dgSearchGrid_RowSelectionChanged">
<Columns>
<ig:BoundDataField DataFieldName="ssn" Key="ssn" Width="6em" >
<Header Text="SSN">
</Header>
</ig:BoundDataField>
<ig:BoundDataField DataFieldName="lname" Key="lname" >
<Header Text="Last Name">
</Header>
</ig:BoundDataField>
<ig:BoundDataField DataFieldName="fname" Key="fname" >
<Header Text="First Name">
</Header>
</ig:BoundDataField>
<ig:BoundDataField DataFieldName="mname" Key="mname" >
<Header Text="MI">
</Header>
</ig:BoundDataField>
<ig:BoundDataField DataFieldName="unit" Key="unit" >
<Header Text="Unit">
</Header>
</ig:BoundDataField>
</Columns>
<Behaviors>
<ig:Paging Enabled="true" PageSize="10"></ig:Paging>
<ig:RowSelectors Enabled="true">
</ig:RowSelectors>
<ig:Selection CellClickAction="Row" RowSelectType="Single" CellSelectType="None">
</ig:Selection>
<ig:ColumnResizing>
</ig:ColumnResizing>
<ig:Sorting SortingMode="Multi">
</ig:Sorting>
<ig:Activation>
</ig:Activation>
</Behaviors>
</ig:WebDataGrid>

Please help!!!

Thanks,

Lonnie