Your best best it to download File Manager from
http://www.gossamer-threads.com/scripts/ install it and find the admin dir click on the password link, then enter your username and password it will then be password protected. Do you have Telnet access? Their is a Telnet command that will do it for you but I'm not quit sure what it is. You might want to get you system admin.. to do it for you.
Thanks
Joey Bost
jbost@sheltonbbs.com