Urgent Help required Could not find stored procedure but its there in Database Explorer

#region AddBus
public int Addbus(BusinessObject.BusinessObject objbo)
{
    //Create Connection
    SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ToString());
    //Open the Connection
    con.Open();
    //pass the procedure
    SqlCommand cmd = new SqlCommand("proc_addbus",con);
    cmd.CommandType = CommandType.StoredProcedure;

    cmd.Parameters.AddWithValue("@svno",objbo.ServiceNo);
    cmd.Parameters.AddWithValue("@fromplace",objbo.FromPlace);
    cmd.Parameters.AddWithValue("@toplace",objbo.Toplace);
    cmd.Parameters.AddWithValue("@capacity",objbo.capacity);
    cmd.Parameters.AddWithValue("@arrtime",objbo.ArriTime);
    cmd.Parameters.AddWithValue("@depttime",objbo.DeptTime);
    cmd.Parameters.AddWithValue("@tname",objbo.TrevalAgnName);
    cmd.Parameters.AddWithValue("@bustype",objbo.BusType);
    int i = cmd.ExecuteNonQuery();
    return i;

}
#endregion