pga309 calibration.xls load problem

Hello All,

I'm using the pga309 sensor interface board together with the pga309 pc interface board on RS232. The Calibration.xls works fine but the "Load Registers from PGA309" button gives a Visual basic error: property or method is not supported for this object. 

In the Visual Basic the debugger shows an error at the line in "italics bold":

Public Sub Read_Bench()

    'reads the currrent register status from the PGA309 bench program

    If CheckPGARun(True, True) Then ' if prgram is running

        ' continue when PGA is connected

        Dim i As Integer

        Dim Old_calc As XlCalculation

        While PGABoard.Boot_Up_Done = False  'wait for eeread

        Wend

        For i = 0 To RegNumber

            PGA309Registers(i) = PGABoard.PGAregister(i)

        Next i

        'MsgBox Str((PGA309Registers(3) And (256)))

        If (PGA309Registers(3) And (256)) = 0 Then 'If RegBits2Index(3, 8, 8) = 0 Then ' If PGA309Registers(3) = 0 Then

            disabled_Vref = PGABoard.OtherPGAstuff

            'MsgBox "reg 3 = 0"

        End If

        Old_calc = Application.Calculation

        Application.Calculation = xlCalculationManual

        Call Memory2Worksheet(Worksheets("Main"))

        Call UpdatePhysDisplay

        Application.Calculate

        Application.Calculation = Old_calc

    End If

End Sub

The designers kit control program is started and all registers are read. The designers kit control program works fine and communication between pc and board is oke. Every register can be read. Also reading the eeprom is not a problem. Only read via the excel is a problem.  Does somebody know what the problem is?

Thanks,

Cor