TCPClient connection problem

[dschell]

Hi

I am trying to make a connection with System.Net.Sock ets.TcpClient() but I am getting an error at the line of conection

////
Dim tcpClient As New System.Net.Sock ets.TcpClient()
'tcpClient.Conn ect("127.0.0.1" , 8000)
Dim nPort As Integer = 2055
tcpClient.Conne ct("127.0.0.1" , nPort) << here is the error
...
...
////

1) What port can/must I use?
2) Must I enable it in Windows Firewall ?

Note: I have nod32 antivirus and I do know if it is disabling the port

Thanks in advance