SSH over Socks proxy without username or password

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http://unix.stackexchange.com – I have a list of SOCKS proxy servers from this site. I've read about creating a dynamic tunnels with ssh -D and to be honest i've tried that already. Unfortunately for some reason i cannot connect to any of the proxy servers from the list. I am using OpenSSH_5.3p1 Debian-3ubuntu7, OpenSSL 0.9.8k on BackTrack. If anyone would be willing to help or point to step by step guide which will work for me i would be very grateful. What i want to achieve is Connect from Machine A through ssh tunnel on Machine B to Machine C. Lets say sshd on Machine C is listening on port 21 and Machine B proxy is l (HowTos)