display search error

[mr.devel]

hi for all i have two stored procedure to retrive data from data base one before

one week and the other before two week

ALTER PROCEDURE beforeweek
	
AS
	select *
from files
where [date] < dateadd(wk,-1,getdate())

and the other

ALTER PROCEDURE beforeweek
	
AS
	select *
from files

where [date] < dateadd(wk,-2,getdate())

and in my search page i add dropdownlist have two values

for choice the values is week and tweek
i add inside button search this code

Session["date"] = DropDownList2.SelectedValue;
Response.Redirect("resultpage.aspx");

and inside the second page i add gridview to display the result

and i add inside page load event this code

if (Session["date"] != null)
    { if(Session ["date"]=="week"){
      SqlCommand cmd = new SqlCommand("beforeweek", conn);
      cmd.CommandType = CommandType.StoredProcedure;
      SqlDataAdapter dept = new SqlDataAdapter(cmd);
      DataSet dsw = new DataSet("files");
      dept.Fill(dsw);
      GridView1.DataSource = dsw;
      GridView1.DataBind();}
      else if(Session ["date"]=="tweek"){
        SqlCommand cmd = new SqlCommand("beforetwoweek", conn);
        cmd.CommandType = CommandType.StoredProcedure;
        SqlDataAdapter dept = new SqlDataAdapter(cmd);
        DataSet dst = new DataSet("files");
        dept.Fill(dst);
        GridView1.DataSource = dst;
        GridView1.DataBind();
      }
    }

but without result any one can modify and correct to me

the code

and thanks