perl troubles with vhcs

[KeNt]

code] ./vhcs2-vrl-traff
If specified by -literal_key, then the key length must be equal to the chosen cipher's key length of 56 bytes at /var/www/vhcs2/engine/traffic/../vhcs2_common_code.pl line 1443
Compilation failed in require at ./vhcs2-vrl-traff line 53.[/code]

Code:

cat vhcs2_common_code.pl | head -n1460 | tail -n20
    }

    my $cipher = Crypt::CBC -> new(
                                    {
                                        'key'             => $main::db_pass_key,
                                        'cipher'          => 'Blowfish',
                                        'iv'              => $main::db_pass_iv,
                                        'regenerate_key'  => 0,
                                        'padding'         => 'space',
                                        'prepend_iv'      => 0
                                    }
                                  );

    my $decoded = decode_base64("$pass\n");

    my $plaintext = $cipher -> decrypt($decoded);


    push_el(\@main::el, 'decrypt_db_password()', 'Ending...');

debian sarge + backports + vhcs2.4.7.1
failed up after updates
how to fix that?