any time you modify ssh, you should always enable telnet and make sure it's running. This way if something screws up, you've got a backup way in the server. Of course, you'll need to have another user (not root) to access telnet itself.
It sounds like you need someone familliar with Linux to help you out here. You can find Linux documentation and manuals @ The Linux Documentation Project
, or just google your questions and errors. They'll help you out.
If you're not familliar with the Linux OS, then you really, really need to be in touch with an administrative company so that they can do stuff like this for you.