I have a radlistbox on a page and when the page loads I get this javascript error:
Sys.WebForms.PageRequestManager is null or not an object
Here is the page code:
Sys.WebForms.PageRequestManager is null or not an object
Here is the page code:
<
telerik:RadScriptManager ID="RadScriptManager1" runat="server" />
<
telerik:RadAjaxPanel runat="server" ID="RadAjaxPanel1">
Player Name:
<telerik:RadTextBox ID="radtxtAddPlayer" MaxLength="110" runat="server" /><asp:Button ID="btnAddPlayer" OnClick="btnAddPlayer_Click" Text="Add Player" runat="server" />
<
telerik:RadListBox ID="radlstPlayerPosition"
runat="server" height="300px" width="150px"
DataTextField="PlayerName" DataValueField="nPlayerID" AllowDelete="true"
AllowReorder="true" AllowTransfer="false" AutoPostBack="True">
</telerik:RadListBox>
</
telerik:RadAjaxPanel>
Any ideas why I would get this error? adding a player works even with the error there???