Check the user table in mysql. Is there a user 'tester' and if yes, which host is allowed to connect?
Additionally, pay attention to the footer line. You can run it, its no evil code, simply a message. ;o)
Rgds
Gnork
perl -e 'print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'