INSERT data from one Access table to another Access table in VB.NET 2005

I am trying to insert data from one MS Access table to another MS Access table in a different db using VB.NET 2005.  Below is the code I have written, but I continue to get an syntax error when executing the code at "Cnxn3.execute(strSQL).

Here is the code:
        Dim Cnxn2 As ADODB.Connection
        Dim Cnxn3 As ADODB.Connection
        Dim strSQL As String
        Dim Rs As New ADODB.Recordset
        Dim connectionString As String = "Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=SmallGroupBookOfBusinessSQL;Data Source=SGBOBT, 1435"

        'Open a connection using the Microsoft Jet provider
        Cnxn2 = New ADODB.Connection
        Cnxn2.Provider = "Microsoft.Jet.OLEDB.4.0"
        Cnxn2.Open("c:\data\Encrypted\plan sponsor module\Plan_Sponsor_Module.mdb", _
        "Admin", "")

        'Open a connection using the Microsoft Jet provider
        Cnxn3 = New ADODB.Connection
        Cnxn3.Provider = "Microsoft.Jet.OLEDB.4.0"
        Cnxn3.Open("\\Winp-oa-100\winplnspmd\plan sponsor module admin\Plan_Sponsor_Module.mdb", _
        "Admin", "")

        strSQL = "SELECT * FROM tblUpdates"
        Rs.Open(strSQL, Cnxn2, ADODB.CursorTypeEnum.adOpenStatic, ADODB.LockTypeEnum.adLockReadOnly)

        If Rs.State = 1 Then
            If Rs.RecordCount > 0 Then
                Do Until Rs.EOF
                    strSQL = "INSERT tblUpdates (PSUID) "
                    strSQL = strSQL & "VALUES("
                    If IsDBNull(Rs.Fields("PSUID").Value) Then
                        strSQL = strSQL & "NULL)"
                    Else
                        strSQL = strSQL & Rs.Fields("PSUID").Value & ")"
                    End If
                     Cnxn3.Execute(strSQL)
                    Rs.MoveNext()
                Loop
            End If
        End If
        Rs.Close()
        Cnxn3.Close()
        Exit Sub