Run-time Error '13' Type Mistype

I created a Duplicate command/macro on a form and, when it is clicked on, a message appeared 'Run-time error '13' Type mismatch'. Debugging the command showed the problem was this code line:

MsgBox Err.Number, Err.Description

in the bDuplicateCurrentRecord section (shown below).

Below is the whole Duplicate coding. The coding was copied from another Duplicate template db as I am no expert on coding. It worked on 97 version but not on 2000 version.

Private Sub bDuplicateCurrentRecord_Click()
On Error GoTo Err_bDuplicateCurrentRecord_Click

Beep

Dim sBookingID As String
Dim sSerialNo As String
Dim sNameOfHost As String
Dim sTrustOrNonTrust As String
Dim sDepartment As String
Dim sContactTelephone As String
Dim sContactMobile As String
Dim sContactFax As String
Dim sDateOfRequest As String
Dim sDateOfFunction As String
Dim sTimeRequiredStart As String
Dim sTimeRequiredEnd As String
Dim sVenue As String
Dim sReasonForBooking As String
Dim sNoOfGuests As String
Dim sStandingOrder As String
Dim sComments As String
Dim sBookingReceivedBy As String
Dim sNonStandardCharge As String
Dim sTrustTotalCost As String
Dim sNonTrustTotalCost As String
Dim sWhenPaymentMade As String
Dim sPaymentMethod As String

sBookingID = BookingID
sSerialNo = SerialNo
sNameOfHost = NameOfHost
sTrustOrNonTrust = TrustOrNonTrust
sDepartment = Department
sContactTelephone = ContactTelephone
sContactMobile = ContactMobile
sContactFax = ContactFax
sDateOfRequest = DateOfRequest
sDateOfFunction = DateOfFunction
sTimeRequiredStart = TimeRequiredStart
sTimeRequiredEnd = TimeRequiredEnd
sVenue = Venue
sReasonForBooking = ReasonForBooking
sNoOfGuests = NoOfGuests
sStandingOrder = StandingOrder
sComments = Comments
sBookingReceivedBy = BookingReceivedBy
sNonStandardCharge = NonStandardCharge
sTrustTotalCost = TrustTotalCost
sNonTrustTotalCost = NonTrustTotalCost
sWhenPaymentMade = WhenPaymentMade
sPaymentMethod = PaymentMethod

DoCmd.GoToRecord , , acNewRec

BookingID = sBookingID
SerialNo = sSerialNo
NameOfHost = sNameOfHost
TrustOrNonTrust = sTrustOrNonTrust
Department = sDepartment
ContactTelephone = sContactTelephone
ContactMobile = sContactMobile
ContactFax = sContactFax
DateOfRequest = sDateOfRequest
DateOfFunction = sDateOfFunction
TimeRequiredStart = sTimeRequiredStart
TimeRequiredEnd = sTimeRequiredEnd
Venue = sVenue
ReasonForBooking = sReasonForBooking
NoOfGuests = sNoOfGuests
StandingOrder = sStandingOrder
Comments = sComments
BookingReceivedBy = sBookingReceivedBy
NonStandardCharge = sNonStandardCharge
TrustTotalCost = sTrustTotalCost
NonTrustTotalCost = sNonTrustTotalCost
WhenPaymentMade = sWhenPaymentMade
PaymentMethod = sPaymentMethod

sBookingID = ""
sSerialNo = ""
sNameOfHost = ""
sTrustOrNonTrust = ""
sDepartment = ""
sContactTelephone = ""
sContactMobile = ""
sContactFax = ""
sDateOfRequest = ""
sDateOfFunction = ""
sTimeRequiredStart = ""
sTimeRequiredEnd = ""
sVenue = ""
sReasonForBooking = ""
sNoOfGuests = ""
sStandingOrder = ""
sComments = ""
sBookingReceivedBy = ""
sNonStandardCharge = ""
sTrustTotalCost = ""
sNonTrustTotalCost = ""
sWhenPaymentMade = ""
sPaymentMethod = ""

Exit_bDuplicateCurrentRecord_Click:
Exit Sub

Err_bDuplicateCurrentRecord_Click:
If Err = 94 Then 'Invalid use of Null'
Beep
MsgBox "A box is incomplete. Please ensure that all boxes are completed before attempting to duplicate the current booking.", vbInformation, "Invalid Duplication"
Exit Sub
ElseIf Err = 2113 Then 'The data you entered is not valid for this box.
Exit Sub
Else
MsgBox Err.Number, Err.Description
Resume Exit_bDuplicateCurrentRecord_Click
End If

End Sub


Private Sub bDeleteCurrentRecord_Click()
On Error GoToErr_bDeleteCurrentRecord_Click

Beep
If MsgBox("Are you sure you want to delete the current record?", vbQuestion + vbYesNo, "Delete Current Record?") = vbYes Then
DoCmd.RunCommand ac CmdDeleteRecord
End If

Exit_bDuplicateCurrentRecord_Click:
Exit Sub

Err_bDeleteCurrentRecord_Click:
If Err=2501 The 'The RunCommand action was cancelled
Exit Sub
Else
MsgBox Err.Number, Err.Description
Resume Exit_bDeleteCurrentRecord_Click
End If

End Sub

Can anyone help?

Thanks.

Paul