First, you must have been granted shell access. We generally do not give it for individual accounts on the shared servers. If you regularly use it, or have a nameserver account with us, we will set you up on a server where we do allow SSH2 access.
If Port 22 is not working for you, try Port 8888.
We have started setting up servers to use that alternate port as a measure against automated hacking of the more-commonly used port.