Android

Iam having android code bellow:
after send request to asp page than receiving respond content.
I have a problem : asp page not open and in page load function I get data from request . but it is null.
Somebody help me. get data from asp page

Android code
 public String SendDataWebForm()
	  {
	  
		  String line = "", rs = "";
		  HttpClient client = new DefaultHttpClient();
		    HttpPost post = new HttpPost("http://tracklocation.somee.com/maps.aspx?id=12321");
		    try {
		      List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
		      nameValuePairs.add(new BasicNameValuePair("imei","123456789"));

		      post.setEntity(new UrlEncodedFormEntity(nameValuePairs));

		      HttpResponse response = client.execute(post);
		     // BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
		      rs = response.toString();
		    } catch (IOException e) {
		      e.printStackTrace();
		    }
		    return rs;
		  }
		   
ASP code
namespace WebLocationPredicttion
{
    public partial class maps : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            string text = Page.Request.Form["imei"];
      
       }
    }
}

[WebMethod]
       public string DataLocation(string location)
       {
           string url = "http://tracklocation.somee.com/Default.aspx?id=" + location

           Context.Response.Redirect(url);

           location = Server.UrlDecode(location);
           return location;

       }