How start the tnslistener / how edit connection string

hi master
sir i am useing jsp with oracle
my page give me right result in my system but when i test client system then system give me this error
Database Log In Failed
TNS could not resolve service name
Verify that the TNS name in the connectstring entry of the DAD for this URL is valid.
sir i post my problem in java.sun forum he reply me as under
================
on your machine where your db is installed, start the tnslistener of your database, make sure that your connection string is pointing to that machine
jdbc:oracle:thin:@<ip or hostname of machine where your db is installed>: 1521:aamir
===========
please give me idea how i run my page in client system
tahnk's
aamir

Strat TnsListener with
C:/>LSNRCTL START
Check the status of the listener with
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