Converting a DAO Record Set to a Disabled ADO Record Set dbDecimal Issue

In MS Access VBA (2007), I wrote the following functions to convert a DAO record set to a disabled ADO record set in memory. The problem is that I am having problems converting data types to dbDecimal DAO. The problem occurs when I try to insert data from a DAO record set into a newly created ADO record set. When I get to the DAO dbDecimal (ADO adNumeric) type column, I get the following error:

Error -2147217887 (80040e21): 
Multiple-step operation generated errors. Check each status value.

I looked and an error occurs every time it falls into this column. The data contained in this column are primes such as 25, 44, 60, etc.

As you can see below, I hardcoded my NumericScale and Precision, but that doesn't help anything.

Public Function ConvertDAORStoADORS(ByRef r1 As DAO.Recordset) As ADODb.Recordset

    If Not r1 Is Nothing Then

        Dim ra As ADODb.Recordset
        Set ra = New ADODb.Recordset

        Dim f1 As DAO.Field, fa As ADODb.Field

        For Each f1 In r1.Fields
            Select Case f1.Type
                Case dbText
                    ra.Fields.Append f1.Name, adVarWChar, f1.Size, adFldIsNullable
                Case dbMemo
                    ra.Fields.Append f1.Name, adLongVarWChar, 10000, adFldIsNullable

                'Here the problematic one
                Case dbDecimal
                    ra.Fields.Append f1.Name, adNumeric, , adFldIsNullable
                    Set fa = ra.Fields(f1.Name)
                    fa.NumericScale = 19
                    fa.Precision = 4

                Case 9, dbLongBinary, dbAttachment, dbComplexByte, dbComplexInteger, dbComplexLong, dbComplexText, dbComplexSingle, dbComplexDouble, dbComplexGUID, dbComplexDecimal
                    'Unsupported types
                Case Else
                    Debug.Print f1.Name & " " & f1.Type
                    ra.Fields.Append f1.Name, GetADOFieldType(f1.Type), , adFldIsNullable

            End Select
        Next f1
        ra.LockType = adLockPessimistic
        ra.Open
        'On Error Resume Next
        If Not (r1.EOF And r1.BOF) Then
            r1.MoveFirst
            Do Until r1.EOF = True
                ra.AddNew
                For Each f1 In r1.Fields
                    'Error -2147217887 (80040e21) Multiple-step operation generated errors. Check each status value.
                    'Error only occurs on dbDecimal/adNumeric fields
                    ra(f1.Name).value = r1(f1.Name).value
                Next f1
                ra.Update
                r1.MoveNext
            Loop
        End If

        Set ConvertDAORStoADORS = ra
    End If

End Function

Private Function GetADOFieldType(daofieldtype As Integer) As Long
    Select Case daofieldtype
        'Fixed width adWChar does not exist
        Case dbText: GetADOFieldType = adVarWChar
        Case dbMemo: GetADOFieldType = adLongVarWChar
        Case dbByte: GetADOFieldType = adUnsignedTinyInt
        Case dbInteger: GetADOFieldType = adSmallInt
        Case dbLong: GetADOFieldType = adInteger
        Case dbSingle: GetADOFieldType = adSingle
        Case dbDouble: GetADOFieldType = adDouble
        Case dbGUID: GetADOFieldType = adGUID
        Case dbDecimal: GetADOFieldType = adNumeric
        Case dbDate: GetADOFieldType = adDate
        Case dbCurrency: GetADOFieldType = adCurrency
        Case dbBoolean: GetADOFieldType = adBoolean
        Case dbLongBinary: GetADOFieldType = adLongVarBinary
        Case dbBinary: GetADOFieldType = adVarBinary
        Case Else: GetADOFieldType = adVarWChar
    End Select
End Function

DAO ODBC, MS SQL Server 2008. SQL Server Decimal (19,4).

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