Exactly what Danny noticed, R65 sounds SecurePlatform to me as well. But since you noticed the "#" in the shell, I would also say that you're not in the user mode (cpshell) but rather in a different shell. Do you have access to the webinterface maybe? Can you add another user there and see if you can go to expert mode from this one?
Another thing I noticed, is that you mention upgrade_export. Is this remote location configured as standalone or distributed (centrally managed)? I'm asking this because it's not possible to use the upgrade_export on a FW node without management installed. This tool makes an export of the management database.
Also "show configuration" is a GAIA command and can't be used in SecurePlatform, as far as I remember.
Just a wild guess; is this one running on a nokia box maybe?
/Martijn