I have some troubles with Net::SNMP or with SNMP on device... I have the following code:

    (my $session, $error) = Net::SNMP->session(
        -version     => $snmp_version,
        -hostname    => $host,
        -community   => $community,
        -port        => $port
    );

    if (!defined($session)) {
        print "[" . &logger_time . "] ERROR: $error.\n";
        $error=1;
    }

    my $result = $session->get_table(
        -baseoid          => $OID_tree,
    );
    if (!defined($result)) {
        print "[" . &logger_time . "] ERROR: $host $OID_tree " .$sessi
+on->error. "\n";
        $session->close;
        $error=1;
    }
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When I try to use it with one of my device, ADSL modem Connexant(other devices, like Cisco, unixbox works good) $session->get_table of this code make the following error : "OBJECT IDENTIFIER length equal to zero" After debuging of the Net::SNMP I have found out that error happens with OID .1.3.6.1.2.1.2.2.1.22.1
snmpwalk works good with this device, and shows:

# snmpwalk -v2c -c public 82.179.195.37 .1.3.6.1.2.1.2.2.1.22.1
interfaces.ifTable.ifEntry.ifSpecific.1 = OID: .ccitt
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How can I make my code, that use Net::SNMP, work with no errors, like snmpwalk?