Ok, well that's definitely being blocked by your school. Any IP range beginning with 10 is an internal IP address, so you can see that it's not even making it out of your school network. The device at 10.252.22.1 is most probably the one responsible for blocking the request, but it's possible the request is actually making it one or two hops further, on devices that aren't responding to ICMP (tracert) requests.

You should ask your school's network admin to look at the logs for that device (most likely a firewall, I'd guess), and possibly do a live test if that can be organised. Unfortunately there's not a lot more I can tell you, other than to kick your IT department and threaten them with great violence.

When it comes to proxies, I'd advise you to be <i>very</i> careful, since a lot of companies have an instant dismissal policy for flouting the network rules. Though you might wanna note down a few of the proxy addresses from http://freeproxysite.com and try them there. As for the FTP thing though, try <a href="http://www.net2ftp.com/">this</a> out. It's an HTTP-based FTP client that operates from within your browser.