No open asp page when I post data from Android

[Ngan Tran]

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"];

   }
}

}