ASP.NET

In Event Viewer WAS is giving below erros
1) application pool is being automaticall disabled due to a series of failures in the process service that application pool

2) A process service application pool "xyz" suffered a fatal communication error with Windows Process Activation Service. The data field contains the error number

 btnLogin_Click(object sender AuthenticateEventArgs e)
    {
        Boolean blnresult;
        blnresult = false;

   blnresult = Authentication(Login1.UserName, Login1.Password);
        if (blnresult == true)
        {
 // This is the actual statement which will authenticate the user
    Response.Redirect("~/Welcom.aspx",false);
            Context.ApplicationInstance.CompleteRequest();
            e.Authenticated = true;}

<asp:content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="server">
    <asp:Login ID="Login1" runat="server"   >
</asp:Login>
</asp:content>

I have a treeview control that gets populated at runtime with a pyramid of employee names. I put the css scrollbar on the view by putting overflow:auto" in the tag where the treeview is located. The users are now asking me to to have the scrollbar go down in the treeview where a treeview item is selected.

How do I make a scroll bar to go to a place where the treeview has been selected?

Note: treeView1.SelectedNode.EnsureVisible();

is not available in asp.net need another way.