when "noobs" think of a proxy, they usually think of a CGI Proxy, not a specific port in another computers firewall that allows (usually unfiltered/unrestricted) traffic.
2sneaky.info is a website, a CGI proxy. so it will not work in transmission.
If you are at home, u shouldn't need to configure anything.
If you are at work or school, trying to evade a content filter, dont. that could get u intro trouble.