I have a redirect question?

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ASP.NET

I am have made a redirect page and code for the page. In my login page I have to redirect link I want the user to redirect to. The question I have is that when I try to redirect to my redirect page it will not go. So I changed the code on my redirect page and tried to login again with a user and it went to that page. Why didn't my redirect code work the first time? And why did it work when I took out the code? The first code is the original one I had the second is the code I changed.

First code:

protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["New"] != null)
        {
            Label1.Text += Session["New"].ToString();
        }
        else
        {
            Response.Redirect("Login.aspx");
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Session["New"] = null;
        Response.Redirect("Login.aspx");
    }
}

Second Code:

protected void Page_Load(object sender, EventArgs e)
    {
        
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Session["New"] = null;
        Response.Redirect("Login.aspx");
    }
}

Please Help.