Error No proxies allowed for some website

[dumdums]

help me please

I got error "No proxies allowed" when press submit button in my.articleslash.net.
I have already checked it. I think this website use php script to check and block transparent proxy.

What should I do?

Remark: I bypass my IP Address and checked with http://www.whatismyip.com already so I sure my IP not have proxy squid. In addition, not have any setting in browser option too.

best regards,
DUMDUMS

[jimp]

Have you run your public IP through an RBL check? Your IP may be on a blacklist, which wouldn't work no matter what firewall you're behind.