whats IPN Hacking? someone changed my amount to $0.01 from $10 huhuhu!

i created an alertpay button for $10, i was paid $0.01 huhuhu! how can I stop these hacker? Whats IPN hacking? Where can I get a good script for my alertpay button, the button i created within alertpay how can they hack the scripts?
sorry im a newbie….

www.ihelpadvertize.com\workfromhome.htm

See original post by ihelpadvertize.com