Connect Db From Different Machine

Hi,
OS : Windows xp
DB : 10.1.0.4.2
I have one database in my machine and i install form developer in my lab Top (Other machine) i try to connect to my database from
my laptop but i can't i got this error ORA-12154. but i can access to my database from database machine.
Regards,

kingadmin wrote:
CLIENT SQLNET FILE
SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (LDAP, TNSNAMES, EZCONNECT, ONAMES, HOSTNAME)
CLIENT TNAMES
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.3)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = NVS)
)content of tnsnames.ora appears to be malformed
below show valid tnsnames.ora & how it is supposed to work
bcm@bcm-laptop:~$ cat /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora
# tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
V112=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=V112)))
bcm@bcm-laptop:~$ sqlplus user1/user1@v112
SQL*Plus: Release 11.2.0.1.0 Production on Thu Apr 26 11:06:01 2012
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
11:06:02 SQL>

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Message was edited by:
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