Add To Cart Button, The counter doesn't increment

Hello..

Please when I click on the Add To Cart Button, The counter doesn't increment and it doesn't throw any error. Please I'm stocked, I need help.

Code:- aspx.cs

protected void itemcommand(object source, DataListCommandEventArgs e)

{

if (e.CommandName !=null)

{

DataListItem row = DataList1.Items[e.Item.ItemIndex];

Label lblFirstName = (Label)row.FindControl("lbl_IDPASS");

string s_uniqueid = lblFirstName.Text;

Session.Add("title", s_uniqueid);

}

last time add to cart item show only detail.. does not increment.....