I have written simple DB connectivity program, i am getting the following error, plesae advice ? 
use strict;
use warnings;
use DBI;

# . /opt/CA/WorkloadAutomationAE/autouser.DEV/autosys.sh.`hostname`

# TNS_ADMIN = "/usr/oracle/product/11.2.0.4/network/admin";
my $driver = "Oracle";
my $database = "ASYSDEV2";
my $dsn = "DBI:$driver:database=$database";
my $userid = "autosysr";
my $password = "A13sm_sd";

my $dbh = DBI->connect($dsn, $userid, $password ) or die $DBI::errstr;

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Error : 
DBI connect('database=ASYSDEV2','autosysr',...) failed: ORA-12154: TNS
+:could not resolve the connect identifier specified (DBD ERROR: OCISe
+rverAttach) at perl_DBI.pl line 15
ORA-12154: TNS:could not resolve the connect identifier specified (DBD
+ ERROR: OCIServerAttach) at perl_DBI.pl line 15.

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In reply to ORA-12154: TNS:could not resolve the connect identifier specified (DBD ERROR: OCIServerAttach) by rajesh_perl

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