perl + oracle environment

I'm struggling to get a perl script up and running on cron. It absolutely has something to do with the environment under which it is running but I can't figure out what the solution is.  

The scipt is called through a soft link. I get the Oracle Sid from the link name and proceed to set the environment from there. I can't seem to figure out how to run oraenv from perl so right now I am doing the following:  

#Set Oracle Home

if (! open ORATAB, "/etc/oratab") {

  die "/etc/oratab does not exist. unable to determine ORACLE_HOME";

}  

while (<ORATAB>) {

  next unless $_ =~ /^$database:(.*):/;

$ENV{ORACLE_HOME} = $1;

$ENV{LD_LIBRARY_PATH} = "$ENV{'ORACLE_HOME'}/lib:/usr/lib:/usr/lib64";

$ENV{TNS_ADMIN} = "$ENV{'ORACLE_HOME'}/network/admin";

}  

my $dbh = DBI->connect("dbi:Oracle:host=$host;sid=$database", $db_user, $db_pass)

         || die "Unable to connect to $database \n" . DBI->errstr;  

# get the directory where datapump will write to.

my $sth = $dbh->prepare('select directory_path from dba_directories where directory_name = ?')

        or die "Couldn't prepare statement" . $dbh->errstr;  

$sth->execute($dp_db_dir)

        or die "Couldn't execute statement" . $sth->errstr;  

my $dp_os_dir = $sth->fetchrow_array();    

The error I'm getting is:  

[oracle_at_dataserver2 scripts]$ ./dp_remgt_full

install_driver(Oracle) failed: Can't load '/usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi/auto/DBD/Ora cle/Oracle.so' for module DBD::Oracle: libclntsh.so.10.1: cannot open shared object file: No such file or directory at /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/DynaLoader.pm line 230, <ORATAB> line 26.

 at (eval 11) line 3

Compilation failed in require at (eval 11) line 3, <ORATAB> line 26.

Perhaps a required shared library or dll isn't installed where expected

 at ./dp_remgt_full line 52  

After I run . oraenv manually, everything is fine.  

Does anyone know what my problem is? I would rather not put a shell wrapper around it to call oraenv with ORAENV_ASK=NO. ...though I would love to do that from within the perl script if I could figure out how (I made several attempts at this with no luck).    

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