problem with session

Your code is fine. May be before coming to this page, you are clearing the session value for textbox somewhere. Or may be you are not properly assigning textbox value to session. Please check this once again and let us know.

thanks my friends see the etract of the code

    protected void Page_Load(object sender, EventArgs e)
    {
        Label1.Text = Session["State"].ToString();
        Label2.Text = Session["Lic"].ToString();
        Label3.Text = Session["Model"].ToString();
        Label4.Text = Session["Make"].ToString();
        Label5.Text = Session["Color"].ToString();
        Label6.Text = Session["Type"].ToString();
        string chas = Session["Chas"].ToString();
        string eng = Session["Eng"].ToString();
        Label7.Text =  chas;
        Label8.Text = eng;
        Label9.Text = Session["CEng"].ToString();
        Label10.Text = Session["Cy"].ToString();
        Label11.Text = Session["Purp"].ToString();
        Label12.Text = Session["LIDate"].ToString();
        Label13.Text = Session["RCertNo"].ToString();
        Label14.Text = Session["test"].ToString();
        Label15.Text = Session["NLA"].ToString();
        Label16.Text = Session["PReg"].ToString();
        Label17.Text = Session["OName"].ToString();
        Label18.Text = Session["OStat"].ToString();
        Label19.Text = Session["OAddr"].ToString();
        Label20.Text = Session["OTown"].ToString();
        Label21.Text = Session["OMobile"].ToString();
        Label22.Text = Session["OEmail"].ToString();
        Label23.Text = Session["PName"].ToString();
        Label24.Text = Session["NR"].ToString();
        Label25.Text = Session["PStat"].ToString();
        Label26.Text = Session["PAddr"].ToString();
        Label27.Text = Session["PTown"].ToString();
        Label28.Text = Session["PEmail"].ToString();
        Label29.Text = Session["PMobile"].ToString();
    }

when i used the label to retrieve the session values,only the dropdownlist controls were saved in the session variables,those of textboxes return no values on the labels

thanks my friends see the etract of the code

    protected void Page_Load(object sender, EventArgs e)
    {
        Label1.Text = Session["State"].ToString();
        Label2.Text = Session["Lic"].ToString();
        Label3.Text = Session["Model"].ToString();
        Label4.Text = Session["Make"].ToString();
        Label5.Text = Session["Color"].ToString();
        Label6.Text = Session["Type"].ToString();
        string chas = Session["Chas"].ToString();
        string eng = Session["Eng"].ToString();
        Label7.Text =  chas;
        Label8.Text = eng;
        Label9.Text = Session["CEng"].ToString();
        Label10.Text = Session["Cy"].ToString();
        Label11.Text = Session["Purp"].ToString();
        Label12.Text = Session["LIDate"].ToString();
        Label13.Text = Session["RCertNo"].ToString();
        Label14.Text = Session["test"].ToString();
        Label15.Text = Session["NLA"].ToString();
        Label16.Text = Session["PReg"].ToString();
        Label17.Text = Session["OName"].ToString();
        Label18.Text = Session["OStat"].ToString();
        Label19.Text = Session["OAddr"].ToString();
        Label20.Text = Session["OTown"].ToString();
        Label21.Text = Session["OMobile"].ToString();
        Label22.Text = Session["OEmail"].ToString();
        Label23.Text = Session["PName"].ToString();
        Label24.Text = Session["NR"].ToString();
        Label25.Text = Session["PStat"].ToString();
        Label26.Text = Session["PAddr"].ToString();
        Label27.Text = Session["PTown"].ToString();
        Label28.Text = Session["PEmail"].ToString();
        Label29.Text = Session["PMobile"].ToString();
    }

when i used the label to retrieve the session values,only the dropdownlist controls were saved in the session variables,those of textboxes return no values on the labels

It is not very clear. Can you please send us your code?