passing correct value types from ASP/VBScript to VB/DLL

[thisis]

Hi All,

I'm getting an error on my ASP page:

Microsoft VBScript runtime error '800a000d'
Type mismatch: 'StoreFileIntoField'

I assume - 99.5% - the error is generated because of worng value types,
I attemp to pass from my ASP/VBScript page to the VB/DLL function.

My relevant ASP/VBScript Code is:

<%
sTemp = "SomeStringOK"
mcsSQL = "select * from tbl1"

' creates an object ref to the VB/DLL function
Set obj = Server.CreateObject("SaveCreateFileADO.cStoreCreat eFileADO")

' creates a ref' to my recordset object
Set rs = Server.CreateObject("ADODB.Recordset")

' openning the recordset with values of the string connection
rs.Open mcsSQL, mConn, 1, 3

With rs
.AddNew
If Not .EOF Then
'VB5: Dim fldFileName As ADODB.Field
'VB5: Set fldFileName = .Fields![sFileName] 'set reference to this field
' vbscript:
Set fldFileName = rs("sFileName")

'VB5: Dim fldLongBinary As ADODB.Field
'VB5: Set fldLongBinary = .Fields![oPicture] 'set a reference to the file field
' vbscript:
Set fldFileName = rs("oPicture")

rs("desc")= now() & "hello"

With obj
' call the VB/DLL
' THIS IS the line that generates the ERROR
If .StoreFileIntoField(rs, fldFileName, fldLongBinary, sTemp) Then
' do something End If
End With
End If
.Update
.Close
End With

%>

The Function in the VB/DLL is - returns a boolean value -
StoreFileIntoField(rs, fldFileName, fldLongBinary, sTemp)
suppose to get THESE values types:
rs VB5: As New ADODB.Recordset
fldFileName VB5: As ADODB.Field
fldLongBinary VB5: As ADODB.Field
sTemp VB5: As String

My Question is :

How do I pass the correct value types from ASP/VBScript to VB/DLL,
using this notion of ADO/ASP 2.0 syntex on PWS 4.0?