Here is a short, working example: 
#!/usr/bin/perl
use Crypt::Blowfish;
use strict;
use warnings;
my $key = pack("H16","0123456789ABCDEF");
my $crypt = new Crypt::Blowfish $key;
my $ciphertext = $crypt->encrypt('8chars12');
my $decrypt = new Crypt::Blowfish $key;
print  $decrypt->decrypt($ciphertext),  $/;

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Somehow your pack and unpack statements have messed it up. I'd suggest you start from the working sample, and add symmetric pack and unpacks to that, and verify that it works after each iteration.

In reply to Re^3: Crypt Blowfish by moritz
in thread Crypt Blowfish by perlsameer

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