Then you aren't using good proxies. Yes that is the correct format. I use (you need an account to see links) to find good free ones. Filter it so that you only get the high anonymity ones as they are the safest. When choosing them, look for green bars on both speed and connection time. Before you put it in the scoresender, test it out in your browser first and go to Neopets homepage to make sure it works. Some of them may be blocked or you need permission to access. The US and Canada ones are the best IMO but just test them out to see which ones work.