Permission denied error when try use Scripting.Dictionary - com

Question

I am using windows server 2008 R2 64-bit and IIS 7.5 and hosting a classic asp (32-bit) web site and invoking COM components on COM server (which too have windows server 2008 R2 64-bit). But getting a error "Permission denied" and error code is 800A0046.
Set oDictAOGroup = CreateObject("Scripting.Dictionary")
oDictAOGroup.Add "1000", "5"
oUser.fn_Update_AO_Groups(oDictAOGroup)
asp website server uses DCOM to communicate with COM server. On asp web site server proxy is created of COM server classes.
I created a test function and passed the values to that function then code works perfectly fine.
oUser.fn_Update_AO_Groups_Test1("1000", "21")
But when try to pass Scipting.Dictionary object then permission denied error is raised.
I have googled a lot for this but all in vain nothing much relevant.
Function's code is
Public Function fn_Update_AO_Groups(vntAODict As Variant)
On Error GoTo ErrorHandler
Dim oADOConnect As AMLCONNECT_V2.clsConnect
Dim oADOConn As ADODB.Connection
Dim oADOCmd As ADODB.Command
Dim vntKey As Variant
If Not objContext Is Nothing Then
Set oADOConnect = objContext.CreateInstance("AMLCONNECT_V2.clsConnect")
Set oADOCmd = objContext.CreateInstance("ADODB.Command")
Else
Set oADOConnect = New clsConnect
Set oADOCmd = New ADODB.Command
End If
If IsObject(vntAODict) Then
If oADOConnect.OpenADOConnection(oADOConn) Then
With oADOCmd
.CommandText = "Sp_Upd_AOGroups"
.CommandType = adCmdStoredProc
.Parameters.Append .CreateParameter("AO_ID", adInteger, adParamInput)
.Parameters.Append .CreateParameter("Email_Group_ID", adInteger, adParamInput)
Set .ActiveConnection = oADOConn
End With
'Execute stored procedure for each item in the dictionary
For Each vntKey In vntAODict.Keys
oADOCmd.Parameters("AO_ID").Value = vntKey
oADOCmd.Parameters("Email_Group_ID").Value = vntAODict(vntKey)
oADOCmd.Execute
Next
End If
End If
TidyUp:
Set oADOConn = Nothing
Set oADOCmd = Nothing
Set oADOConnect = Nothing
Exit Function
ErrorHandler:
Dim ErrHandler As AMLCONNECT_V2.clsConnect
If Not objContext Is Nothing Then
Set ErrHandler = objContext.CreateInstance("AMLCONNECT_V2.clsConnect")
Else
Set ErrHandler = New AMLCONNECT_V2.clsConnect
End If
m_sErrorMessage = "Error Number: " + CStr(Err.Number) + "<BR>" + "Description: " + ErrHandler.LogError(Err.Number, Err.Description, "MODULE: AMLADMIN_V2.clsUsers", "FUNCTION:fn_Update_AO_Groups", errError, errVB, errDatabase, "")
If Not ErrHandler Is Nothing Then Set ErrHandler = Nothing
GoTo TidyUp:
End Function
Can any one suggest a remedy for this ?
code for function accepting string
Public Function fn_Update_AO_Groups_Test1(strKey As String, strValue As String)
On Error GoTo ErrorHandler
Dim oADOConnect As AMLCONNECT_V2.clsConnect
Dim oADOConn As ADODB.Connection
Dim oADOCmd As ADODB.Command
Dim vntKey As Variant
Dim ErrHandlerTest As AMLCONNECT_V2.clsConnect
If Not objContext Is Nothing Then
Set oADOConnect = objContext.CreateInstance("AMLCONNECT_V2.clsConnect")
Set oADOCmd = objContext.CreateInstance("ADODB.Command")
Else
Set oADOConnect = New clsConnect
Set oADOCmd = New ADODB.Command
End If
If oADOConnect.OpenADOConnection(oADOConn) Then
With oADOCmd
.CommandText = "Sp_Upd_AOGroups"
.CommandType = adCmdStoredProc
.Parameters.Append .CreateParameter("AO_ID", adInteger, adParamInput)
.Parameters.Append .CreateParameter("Email_Group_ID", adInteger, adParamInput)
Set .ActiveConnection = oADOConn
End With
'Execute stored procedure for each item in the dictionary
oADOCmd.Parameters("AO_ID").Value = strKey
oADOCmd.Parameters("Email_Group_ID").Value = strValue
oADOCmd.Execute
End If
TidyUp:
Set oADOConn = Nothing
Set oADOCmd = Nothing
Set oADOConnect = Nothing
Exit Function
ErrorHandler:
Dim ErrHandler As AMLCONNECT_V2.clsConnect
If Not objContext Is Nothing Then
Set ErrHandler = objContext.CreateInstance("AMLCONNECT_V2.clsConnect")
Else
Set ErrHandler = New AMLCONNECT_V2.clsConnect
End If
m_sErrorMessage = "Error Number: " + CStr(Err.Number) + "<BR>" + "Description: " + ErrHandler.LogError(Err.Number, Err.Description, "MODULE: AMLADMIN_V2.clsUsers", "FUNCTION:fn_Update_AO_Groups", errError, errVB, errDatabase, "")
If Not ErrHandler Is Nothing Then Set ErrHandler = Nothing
GoTo TidyUp:
End Function
Thanks,
Vaibhav

Answer 1

Too long for comment, so while this is not full answer it might put you on right direction.
First, I noticed the field types are integer while your dictionary keys and values are string. So first try converting those by changing the code in the function to:
oADOCmd.Parameters("AO_ID").Value = CLng(vntKey)
oADOCmd.Parameters("Email_Group_ID").Value = CLng(vntAODict(vntKey))
If still same error, I need to know if the exact same code works fine when you explicitly pass two parameters to the function instead of a dictionary?
Another thing that comes to mind is maybe something is going wrong with your error handling, try to remove it for sake of debug and see if you get more meaningful error message.

Answer 2

Either use Call oUser.fn_Update_AO_Groups(oDictAOGroup) or oUser.fn_Update_AO_Groups oDictAOGroup without parentheses.

Answer 3

Try these signatures instead:
Public Function fn_Update_AO_Groups(ByVal vntAODict As Variant)
or
Public Function fn_Update_AO_Groups(ByVal vntAODict As Scripting.Dictionary)
You demand far more of the marshalling code if you allow the default ByRef to prevail. Also providing the explict type expected gives marshalling code more options too. These changes may be enough to allow the operation you expect.
If that fails I would reconsider the approach, I prefer to pass XML strings through into the SPs. This gives greatest flexibility allowing code changes to SQL and ASP to effect a new requirement without recompilation and deployment of new binaries.