your trying to get at the terminal to issue commands right? I think it's CTRL-ALT-F2 that should load it up... not 100% though. But if that's it you should at least be able to get in and do what you need to do. Like I said though not 100%, Thats how I do it on my desktop. Your logging through a remote server and may not have the privilege, or I could just be wrong. Best info I got: Search Google for Linux Remote Sever No Terminal (or No Prompt) and see what pops up.
Hope you get it figured out, Not being able to tell your system how to act sucks.