С # Progress Bar методы вызова из другого класса

Я пытаюсь сделать полосу выполнения в WinForm работающей, сделав два метода общедоступными, а затем вызывая методы из другого класса (см. Мой пример кода ниже). Но не повезло, планка не двигается.

Вот два класса:

namespace GP_Avantis_Integration
{
    //Class B
    public partial class GP_Avantis_Integration_Window : Form
    {
        public GP_Avantis_Integration_Window()
        {
            InitializeComponent();
        }

        DataSet ds = new DataSet();
        SqlDataAdapter sqlda = new SqlDataAdapter();
        SqlCommand sqlcomm = new SqlCommand();

        public static int recno;

        public void button1_Click(object sender, EventArgs e)
        {
            try
            {
                //Fetch data into memory

                //Fill in Header table

                //Fill in Line table

                //Cleaning open connection

                //Creating relationship in the Dataset between Header and Line table

                // Instantiating and Crearintg Header and Line source

                //Binding the Header source to the Header table

                //Binding the Line source to the relationship
            }

            catch (ApplicationException ae)
            {
            }

            finally
            {
            }
        }

        public void button2_Click(object sender, EventArgs e)
        {
            try
            {

                //Calling CreateJE Class
                //Class Method ProcessData
                CreateJE JE = new CreateJE(); --------> Calls the Class B
                JE.ProcessData(ds);
                MessageBox.Show("Complete!");
            }

            catch (ApplicationException ae)
            {
            }

            finally
            {
            }
        }

        public void progress_Bar_setup()
        {
            progressBar1.Minimum = 0;
            progressBar1.Maximum = CreateJE.max;
        }

        public void progressBar_updates(int recno)
        {
            progressBar1.Value = recno;
            progressBar1.Update();
        }
    }

    // Class B
    class CreateJE
    {
        static public int max;
        public void ProcessData (DataSet ds)
        {
            //Create an eConnect Trx type object
            //POPTransactionType po = new POPTransactionType();

            // ***** PO Header and Line 

            int ln;
            ln = 0;

            //Setting up ProgressBar
            int recno = 1;
            max = ds.Tables[0].Rows.Count;

            GP_Avantis_Integration_Window w = new GP_Avantis_Integration_Window();
            w.progress_Bar_setup();

            // Create an eConnect PO Header node object

            // Create an array for lineitems

            foreach (DataRow dtrHDR in ds.Tables["Header"].Rows)
            {
                //ProgressBar Updates
                w.progressBar_updates(recno);

                //Instantiating GetJE object 
                //Retrieves the next JE from GP

                //Create an eConnect PO Header node object

                //Add the header node to the trx type object

                ln = 0;

                foreach (DataRow dtrLine in dtrHDR.GetChildRows("HdrLine"))
                {
                    // Populate the elements of the taPoLIne_ItemsTaPOLine XML node

                    //Avantis Inv Trx Key

                    // Avantis GL Trx Type

                    //Add POLine to an Array

                    ln ++;
                }

                // Add the header node to the trx type object

                // Add the lineitem node to the trx type object

                // ***** Process information only

                // Create an eConnect document object

                // Create a file on the HD

                // Serialize using the XmlTextWriter to the file

                // Call the eConnectMethods
                // Separate Class

                // Instantiating the object for eConnectMethods class
                // Passing last JRNENTRY retreived using the GetJE class
                // so if there is an error on the eConnectEntry Method of     eConnectMethods Class
                // I can pass the last JE number back to GP

                recno++;
            }  
        }
    }
}