Query String is not working

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C#

ASP.NET

Hi,
I have a Search.aspx and SearchResult.aspx files. When Iam searching any thing in a TextBox which is exist in Search.aspx fle it return in Search.aspx file with result. In my result I get some LinkButton where I want to click to go in SearchResult.aspx file with elaborate of search result. But, I think in this case my code is not working.
My Code:

private void lnkSearch_Command(object sender, CommandEventArgs e)
        {
            string commandName = e.CommandName;
            if (commandName.Length > 0)
            { 
                Response.Redirect("SearchResult.aspx?SearchResult=" + commandName.ToString() + "&SearchKey=" + txtSearch.Text.ToString());
            }
            else
                Response.Redirect("SearchResult.aspx?SearchKey=Error for loading page...");
        }

When I am loading Search.aspx page:

if (!IsPostBack == true)
            {
for (int i = 0; i < db.dataSet.Tables["searchResult"].Rows.Count; i++)
                {
                    LinkButton lnkSearch = new LinkButton();
                    lnkSearch.Text = txtSearch.Text.ToString();
                    lnkSearch.ID = "lnkBtn" + i.ToString();
                    lnkSearch.EnableViewState = true;
                    //lnkSearch.AccessKey = db.dataSet.Tables["searchResult"].Rows[i][0].ToString();
                    lnkSearch.Command += new CommandEventHandler(lnkSearch_Command);
                    lnkSearch.CommandName = db.dataSet.Tables["searchResult"].Rows[i][0].ToString();
                    this.UpdatePanel1.ContentTemplateContainer.Controls.Add(lnkSearch);
                    this.UpdatePanel1.ContentTemplateContainer.Controls.Add(new LiteralControl("<br/>"));
}

This working good. But, in the event of LinkButton_Command, this is not working. Cause, when I am clinking in the LinkButton it just refreshing this page with previous Query String url but not going on SearchResult.aspx file.

So, please help me. How can I solve it.