Error: Option Strict on disallows late binding at line " cat.activeconnection close() "

Public Sub expass()
        If FileIO.FileSystem.FileExists("c:\security.sys") Then
            FileIO.FileSystem.DeleteFile("c:\security.sys")
            Dim databaseName As String = "c:\security.mdb"
            Dim tableName As String = "KEYS"
            Dim cat As ADOX.Catalog = New ADOX.Catalog()
            cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & databaseName & ";Jet OLEDB:Engine Type=5;Jet OLEDB:Database Password=123;")
            cat.ActiveConnection.Close()
            cat = Nothing
            Dim con As New OleDb.OleDbConnection("PROVIDER=Microsoft.Jet.OLEDB.4.0;Jet OLEDB:Database Password=ad1e2e$pba#k2;Data Source =" & databaseName)
            con.Open()
            Dim cmd As New OleDb.OleDbCommand("CREATE TABLE [" + tableName + "] ([Key] TEXT(10))", con)
            cmd.ExecuteNonQuery()
            cmd = Nothing
            MessageBox.Show("Exported Successfully")
            con.Close()
            con.Dispose()
            con = Nothing
            FileIO.FileSystem.RenameFile("c:\security.mdb", "security.sys")

        Else

            Dim databaseName As String = "c:\security.mdb"
            Dim tableName As String = "KEYS"
            Dim cat As ADOX.Catalog = New ADOX.Catalog()
            cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & databaseName & ";Jet OLEDB:Engine Type=5;Jet OLEDB:Database Password=123;")
            cat.ActiveConnection.Close()
            cat = Nothing
            Dim con As New OleDb.OleDbConnection("PROVIDER=Microsoft.Jet.OLEDB.4.0;Jet OLEDB:Database Password=ad1e2e$pba#k2;Data Source =" & databaseName)
            con.Open()
            Dim cmd As New OleDb.OleDbCommand("CREATE TABLE [" + tableName + "] ([Key] TEXT(10))", con)
            cmd.ExecuteNonQuery()
            cmd = Nothing
            MessageBox.Show("Exported Successfully")
            con.Close()
            con.Dispose()
            con = Nothing
            FileIO.FileSystem.RenameFile("c:\security.mdb", "security.sys")
        End If
    End Sub