I think firewall is stopping my paypal from working?

I use firewall wordpress 2.... i was noticing it is stopping all my updates but now I am having a paypal issue too. Nothing happens when you try to buy a listing thru submit-listing page.... it goes as far as clicking the complete & pay button but then reverts back to the homepage (which it does when suspecting an attack).
I am afraid to just disable the firewall....i tried whitelisting the page but no success (not sure I am doing it correctly??)
on the whitelist pages side i put http://www.penntownship.biz/ and on the variable side i put /submit-listing/
Did I do that properly ... nothing changed?
Any recommendations (and can you please explain in detail as much as possible for someone that has a hard time 'getting' it.
thanks for any help...no one can buy an ad on my site till i get this solved. paypal worked previously so not sure why it stopped working on the payments....I think it is an issue with the firewall only since i get the emails saying an attack occurred each time i test it & try to buy an ad.

 

Hello,

I don't think it's a problem with that "firewall wordpress 2" plugin.
But for testing purpose deactivate it and all other plugins too. And check which one is creating this problem.