File uploading problem

Question

hi
 can any one help meeee............
i am uploading file in this way i have add second config file which is below

<?xml version="1.0"?>

<location path="Upload">

  <system.web>

    <httpRuntime executionTimeout="100" maxRequestLength="20202"/>

  </system.web>  

</location>

and cs file is this how can i upload using path which i have declare in config file and  why using 
executionTimeout 

if (FileUpload1.HasFile)

        {

            FileUpload1.SaveAs(Server.MapPath("Upload") + "\\" + FileUpload1.FileName);

        }