AFP Enabling, Firefox & Other Issues - REPOST

Apologies for posting this twice - I realized I had it otherwise in the wrong place.

Since the ATV 3.01 update and ATV Flash 4.02, I can no longer get movies to stream, see my networked drives, or get Firefox to launch. Let me try the movie streaming and network drive seeing first. Like others, when I try to get my networked USB drive to mount, I get the message “AFP is not enabled properly,” and instructions, “Smart Installer with a 1.0 recovery dmg in ~/Documents will fix this issue.”

I went to the wiki page that tells me how to do this, launched terminal and gave it the instruction: “ssh frontrow@appletv.local”. Below is what I got:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
f7:a3:fc:a0:54:c1:df:75:7a:84:37:8d:d4:5a:89:b0.
Please contact your system administrator.
Add correct host key in /Users/randallr/.ssh/known_hosts to get rid of this message.
Offending key in /Users/randallr/.ssh/known_hosts:1
RSA host key for appletv.local has changed and you have requested strict checking.
Host key verification failed.

Now, the wiki says if I get a warning, answer “yes.” But that doesn’t seem to work. I simply don’t know what to do here.

And if anyone can tell me why Firefox won’t launch, I’d be grateful.

Okay, I solved my own problem by looking elsewhere on the site:
On terminal, enter “rm ~/.ssh/known_hosts”
Then follow the wiki for enabling AFP. That seems to allow the drive to mount.