Oracle 10 In Windows Xp Prof - How To Connect The

I've installed ORACLE 10 in a WINDOWS XP PROFESSIONAL as Server. Everything is working OK and my Delphi ERP system is connecting perfectly using the service name by Oracle and BORLAND BDE.But the clients in my network are having difficults to connect. I already install Oracle in other WINDOWS XP computer (parts of it, because I couldn't find the Client option during installation) but I can't CONNECT to the server, gives the message: "ORA-12170: TNS:Connect timeout occurred"Below is the TNSNAMES.ORA from the server. How to configure the client in the program NET CONFIGURATION ASSISTANT???Thanks,DamianVitoria(ES) - Brazil-----# tnsnames.ora Network Configuration File: C:\oracle\product\10.1.0\db_1\network\admin\tnsnam es.ora# Generated by Oracle configuration tools.ORCL2_CREA.RM.COM.BR =(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = GATEWAY.orsa.com.br)(PORT = 1521))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = ORCL2_CR.RM.COM.BR)))