Code: C:\ptc\proiclient3.4\i486_nt\obj\oracle920\bin>tnsping TNS Ping Utility for 32-bit Windows: Version 9.2.0.7.0 - Production on 30-JUN-2010 08:25:47 Copyright (c) 1997 Oracle Corporation. All rights reserved. TNS-03502: Insufficient arguments. Usage: tnsping <address> [<count>] C:\ptc\proiclient3.4\i486_nt\obj\oracle920\bin> Where I can find this address? I tried to use ip address where oracle server is installed. This is the result: Code: TNS Ping Utility for 32-bit Windows: Version 9.2.0.7.0 - Production on 30-JUN-2010 08:34:05 Copyright (c) 1997 Oracle Corporation. All rights reserved. Used parameter files: C:\ptc\proiclient3.4\sqlnet.ora TNS-03505: Failed to resolve name sqlnet.ora is the same in Ubuntu and Xp. I tried the same thing on XP: same problem. But in XP Intralink works.