My updatePanel don't update when I use the Update method

[akif53]

My update pannel don't be updated when I use UpDetail.update() in my codebehind file.\[code\]<asp:UpdatePanel ID="UpDetail" runat="server" RenderMode="Inline" UpdateMode="Conditional"> <ContentTemplate> <asp:Label ID="AAAA" runat="server"> LOL </asp:Label> <asp:Label ID="Label1" runat="server"> <%= DateTime.Now.ToString() %> </asp:Label> </ContentTemplate> </asp:UpdatePanel> \[/code\]And in my cs file :\[code\]protected void GvGestionnaires_SelectionChanged(object sender, EventArgs e) { AAAA.Text = "TOTO"; UpDetail.Update(); }\[/code\]My event GvGestionnaires_SelectionChanged is working but my panel is not refresh, why ?