ASP.Net cross-page referencing

Error    2    The type or namespace name 'EnterData' could not be found (are you missing a using directive or an assembly reference?)    C:UsersM1330DocumentsVisual Studio 2005WebSitesHomework 2DisplayData.aspx.cs    17    21    C:...Homework 2 

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class EnterData : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    public string GetEmpID
    {

        get
        {
            return txtEmployeeID.Text;
        }
    }

    public string GetEmpName
    {

        get
        {
            return txtEmpName.Text;
        }
    }

    public decimal GetHours
    {

        get
        {
            return Double.Parse(txtHours);
        }
    }

    public Double GetType
    {

        get
        {
            if (rdbEmpCasualLaborer.Checked)
                type = 7.75;
            if (rdbEmpApprentice.Checked)
                type = 10.65;
            if (rdbEmpJourneyman.Checked)
                type = 15.75;

            return type;
        }
    }
}

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class DisplayData : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        EnterData prevPage = prevPage = (EnterData) PreviousPage;

        Double grossPay = (prevPage.GetType) *
                                (prevPage.GetHours);
        string empName = prevPage.GetEmpName;
        string empID = prevPage.GetEmpID;


        // -----------Setup row 1 ------------------
        TableRow tr1 = new TableRow();
        tr1.Font.Bold = true;

        // Set up cells for row 1
        TableCell r1c1 = new TableCell();
        r1c1.Text = "Description";
        r1c1.Width = 100;
        TableCell r1c2 = new TableCell();
        r1c2.Text = "Amount";
        r1c2.Width = 100;

        //Add cells to row 1
        tr1.Cells.Add(r1c1);
        tr1.Cells.Add(r1c2);

        // ----------- Setup Row 2 ------------------
        TableRow tr2 = new TableRow();

        TableCell r2c1 = new TableCell();
        r2c1.Text = "Gross Pay";
        r2c1.Width = 100;
        TableCell r2c2 = new TableCell();
        r2c2.Text = grossPay.ToString();
        r2c2.Width = 100;

        // ----------- Setup Row 3 ------------------
        TableRow tr3 = new TableRow();

        TableCell r3c1 = new TableCell();
        r3c1.Text = " ";
        r3c1.Width = 100;
        TableCell r3c2 = new TableCell();
        r3c2.Text = " ";
        r3c2.Width = 100;

        // ----------- Setup Row 4 ------------------
        TableRow tr4 = new TableRow();

        TableCell r4c1 = new TableCell();
        r4c1.Text = "Federal Income Tax";
        r4c1.Width = 100;
        TableCell r4c2 = new TableCell();
        double deduction1 = grossPay * .185;
        r4c2.Text = "$" + deduction1;
        r4c2.Width = 100;

        // ----------- Setup Row 5 ------------------
        TableRow tr5 = new TableRow();

        TableCell r5c1 = new TableCell();
        r5c1.Text = "State Income Tax";
        r5c1.Width = 100;
        TableCell r5c2 = new TableCell();
        double deduction2 = grossPay * .032;
        r5c2.Text = "$" + deduction2;
        r5c2.Width = 100;

        // ----------- Setup Row 6 ------------------
        TableRow tr6 = new TableRow();

        TableCell r6c1 = new TableCell();
        r6c1.Text = "Social Security Tax";
        r6c1.Width = 100;
        TableCell r6c2 = new TableCell();
        double deduction3 = grossPay * .0585;
        r6c2.Text = "$" + deduction3;
        r6c2.Width = 100;

        // ----------- Setup Row 7 ------------------
        TableRow tr7 = new TableRow();

        TableCell r7c1 = new TableCell();
        r7c1.Text = "Medicare/Medicaid Tax";
        r7c1.Width = 100;
        TableCell r7c2 = new TableCell();
        double deduction4 = grossPay*.0075;
        r7c2.Text = "$" + deduction4;
        r7c2.Width = 100;

        // ----------- Setup Row 8 ------------------
        TableRow tr8 = new TableRow();

        TableCell r8c1 = new TableCell();
        r8c1.Text = "Pension Plan";
        r8c1.Width = 100;
        TableCell r8c2 = new TableCell();
        double deduction5 = grossPay*.005;
        r8c2.Text = "$" + deduction5;
        r8c2.Width = 100;

        // ----------- Setup Row 9 ------------------
        TableRow tr9 = new TableRow();

        TableCell r9c1 = new TableCell();
        r9c1.Text = "Health Insurance";
        r9c1.Width = 100;
        TableCell r9c2 = new TableCell();
        double deduction6 = 5.15;
        r9c2.Text = "$" + deduction6;
        r9c2.Width = 100;

        // ----------- Setup Row 10 ------------------
        TableRow tr10 = new TableRow();

        TableCell r10c1 = new TableCell();
        r10c1.Text = " ";
        r10c1.Width = 100;
        TableCell r10c2 = new TableCell();
        r10c2.Text = " ";
        r10c2.Width = 100;

        // ----------- Setup Row 11 ------------------
        TableRow tr11 = new TableRow();

        TableCell r11c1 = new TableCell();
        r11c1.Text = "Net Income";
        r11c1.Width = 100;
        TableCell r11c2 = new TableCell();
        double netPay = grossPay - deduction1 - deduction2
                        - deduction3 - deduction4 - deduction5
                         - deduction6;
        r11c2.Text = netPay.ToString();
        r11c2.Width = 100;
    }
}