Problem with RowEditing-Event

Hi everybody,

sorry, i have a new problem.

In my edititemtemplate i will set a panel visible true, if the selected Value of Dropdownlist is 750.

<EditItemTemplate>
   ...
 <div class = "divBox">
     <div>Bildungspunkte</div>
     <div>  
     <asp:DropDownList ID="ddBildungspunkte"
        CssClass="foselect"
        AutoPostBack="true"
        runat="server"
        DataSource='<%# getBildungspunkte %>'
      ...