How to bind Ajax Calender Extender to database

I am using ajax calender exterder to pick date and month to my database , but some how , i cant bind the calender externder to my database
here is my code ,can you help me out ?

<cc1:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"> </cc1:ToolkitScriptManager> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Select Date: <asp:TextBox ID="DateQualifiedTextBox" Text='<%#Bind("DateQualified" , "{0: MM/dd/yyyy}") %>' runat="server" Rea ...