[Problem] Viral Referral Script

Hi guys,
I tried this referral script shared here:
http://www.blackhatworld.com/blackhat-seo/member-downloads/464408-get-viral-referral-script.html

I tried and tried but i cant get it working.

I mean sometimes, it doesnt change the referral count, and sometimes, it shows some code in the page. Sometimes everything works but it doesnt unlock!

Im no coder, also i have absolute 0th idea on PHP stuff, if someone can help out it'd be a great help. I'll give u access to almost anything via team viewer or whatever you like, please just help me to fix it...
thanks

thanks