HTTP Proxies Not Working

Hello, I have been using http proxies for the last few months and now they stopped working. Not sure how they're detecting my ip.. maybe through flash?? silver light or java? I only have flash enabled. Has this happened to anyone? If so, did you figure out a way around it with http proxies? I was thinking it could be something in the history css, etc but I clear everything on the switch of each http proxy.. VPN's are the only thing that seem to work now.. Thanks for any help..

use ccleaner to remove all the traces
it will delete all the cookies including your flash cookies
if you are using firefox then press ctrl + shift + del
select all and press clear now

agree with pavan clear all cookies after each instance
ccleaner isnt to bad either

CCLeaner is my one and only solution to hide all the tracks and clear it up.

How did you used the proxies ?

for what and with what you were using the proxies?