hmmmmm I used the original proxy/port and IT WORKED!!

Problem is I disconnected and it no longer works, ******* campus computer police! Ok, so I have played with atleast 10 different proxy/port combos given here

http://www.freeproxy.ru/download/lists/goodproxy.txt

and so far squat.

NOW, do I keep trying or should I give up? Also, does it matter if I use socks V4, V5, or HTTP to run a proxy/port or should I try a proxy/port for each? I would especually like to know how well that site works for anybody else.