How to check a CheckBox in GridView based on Database value in ASP.Net

My query is to access the true/false value of checkbox in gridview.

i bind data into gridview where i used a checkbox in itemtemplate and bind the value with database field with checkbox Checked Property.

but it doesn't work any more?please give your valuable solution.

here in below code active is field where i stored the checkbox value True/False.

<ItemTemplate>
           <asp:CheckBox ID="cb_active" runat="server" Checked='<%# Eval("active")%>' />
 </ItemTemplate>