Running very Slow

Hi,
I have a very difficult solution(for me) need your help. I created the following code for my application. it run as wht i want but the problem is the process is very slow. it takes more than 10 seconds. Could you pls help me to make the code run much faster? here is my codes:

Dim rst As ADODB.Recordset
Dim query As String
Dim query1 As String
Dim x As Variant

x = Null
'Find Ident No
If Len(cbIdentNo) <> 0 Then
    x = "[IdentMaster].[IdentNo]=""" & cbIdentNo & """"
End If
'Find Machine Manufacturer ID
If Not IsNull(cbManufacturer) And cbManufacturer <> Empty Then
    If Not IsNull(x) Then
        x = x & " and " & "[MachineManufacturerID]=" & tbManufacturer.Text
    Else
        x = "[MachineManufacturerID]=" & tbManufacturer.Text  
    End If
End If

query = "SELECT IdentMaster.IdentNo, ArtMachineManufacturer.MachineManufacturerID , ArtMachineType.MachineTypeID" _
& " FROM IdentMaster, ArtMachineManufacturer" _
& " where " & x & " order by IdentMaster.IdentNo" _
& " WITH OWNERACCESS OPTION"

Set rst = New ADODB.Recordset
rst.CursorType = adOpenStatic
rst.Open query, conn, , , adCmdText

conn.Execute "Delete * from Result"
'retrieve Result field.
Dim rst1 As ADODB.Recordset
Set rst1 = New ADODB.Recordset
rst1.Open "Select * from Result", conn, adOpenKeyset, adLockOptimistic, adCmdText
Dim intCount, i As Integer
    rst.MoveLast
    intCount = rst.RecordCount
    rst.MoveFirst
    Do Until rst.EOF
        Dim rst2 As ADODB.Recordset
        Set rst2 = New ADODB.Recordset
        rst2.Open "select IdentNo from result where identno =""" & rst!IdentNo & """", conn, adOpenKeyset, adLockOptimistic, adCmdText
        If rst2.RecordCount = 0 Then
            With rst1
            .AddNew
            !IdentNo = rst!IdentNo
            !MachineManufacturerID = rst!MachineManufacturerID
            !MachineTypeID = rst!MachineTypeID
            !GroupID = rst!GroupID
            !product = rst!product
            !Dimension = FindDimension(rst!IdentNo)
            !ToolApplicationID = rst!ToolApplicationID
            .Update
            End With
        End If
        rst.MoveNext
    Loop
    'rst1.Update
End If

Function FindDimension(IdentNo) As String
Dim rst As New ADODB.Recordset
Dim connect_string As String
connect_string = Connection()

With rst
    .CursorLocation = adUseServer
    .CursorType = adOpenKeyset
    .Open "IdentMaster", connect_string, adOpenKeyset, adLockOptimistic, adCmdTableDirect
    .Index = "PrimaryKey"
End With
'rst.MoveFirst
rst.Seek Array(IdentNo)
If Not rst.EOF Then
    Select Case rst!categorytype
        Case "KSN"
        FindDimension = rst!D & "x" & rst!B & "x" & rst!dSmall & " Z=" & rst!Z & " NL/DKN=" & rst!NL & "/" & rst!DKN
    End Select
End If

rst.Close
Set rst = Nothing
End Function

Thank you.
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