I'm unable to do any commands on my server: /sethome, /home, everything I get these errors in the console on my server:

• MultiHome: Player [name] tried to set default home location. Permission not granted.
  -MultiHome: Player {name} tried to warp to home location [3]. Permission not granted.
  I've tried playing with my permissions.yml file, but nothing I try seems to work. I wasn't exactly sure what to do with the permissions file, so I could've easily been doing something wrong.
  I'm not sure if this is just me or if it's a permissions bug, but this was the only place I found to post it.

Hopefully you've long since solved this issue, but you should have looked for help on this in the thread on bukkit.org or on the dev.bukkit site. The short answer is it sounds like you don't have a permissions plugin installed. Try getting PermissionsBukkit and reading up on how to use it.