could not find stored procedure'procedurename' error

public class Class1
{
    private int _Event;
    private int _EmpId;
    private string _EmpName;
    private int _Salary;
    private string _City;
    private int _Atype;

    public int Event
    {
        get { return _Event; }
        set { Event = value; }
    }
    public int EmpId
    {
        get { return _EmpId; }
        set { _EmpId = value; }
    }
    public string EmpName
    {
        get { return _EmpName; }
        set { _EmpName = value; }
    }
    public int Salary
    {
        get { return _Salary; }
        set { _Salary = value; }
    }
    public string City
    {
        get { return _City; }
        set { _City = value; }
    }
    public int Atype
    {
        get { return _Atype; }
        set { _Atype = value; }
    }
	public void save()
	{
        String constr = ConfigurationManager.ConnectionStrings["TestConnectionString"].ConnectionString;
        SqlConnection connect = new SqlConnection(constr);
        SqlCommand command = new SqlCommand("spAllinone", connect);
        command.CommandType = CommandType.StoredProcedure;
        command.Parameters.Add("@event", SqlDbType.TinyInt).Value = Atype;
        command.Parameters.Add("@EmpId", SqlDbType.Int).Value = EmpId ;
        command.Parameters.Add("@Emp_name", SqlDbType.NVarChar,50).Value = EmpName ;
        command.Parameters.Add("@Salary", SqlDbType.Int).Value = Salary ;
        command.Parameters.Add("@City", SqlDbType.NVarChar,50).Value = City ;
        connect.Open();
        command.ExecuteNonQuery();
        command.Connection.Close();

protected void Button1_Click(object sender, EventArgs e)
{
    Class1 obj = new Class1();
   obj.EmpId = Convert.ToInt32(txtEmpId.Text);
    obj.EmpName = txtEmpName.Text;
    obj.Salary = Convert.ToInt32(txtSalary.Text);
    obj.City = txtCity.Text;
    obj.Atype = Convert.ToInt32(txtEvent.Text);
    obj.save();