Bukkit

I am currently using the latest version on bukkitdev website.

for the sake of simplicty, here is my issue:

I am using http://wiki.citizensnpcs.com/Sentry

I want people to create their own npc, but use the Command Signs to add them certain sentry "stats" such as strength or armor.

here is what i do:

/cmds 1 /^trait sentry                              <<== so that their npc is converted into a sentry, (use would normally not have perm, thus ^)
/cmds 2 /^sentry strength 5                     <<== so that the sentry's stat is changed. (use would normally not have perm, thus ^)

I assign this and I punch the sign. The first line is executed correctly, but the second line returns:
11:26 AM [SEVERE] Could not pass event PlayerInteractEvent to CommandSigns v1.9.0.1

I love your plugin and I use it for a plethora of tasks, any help you can give to help with this issue would be greatly appreciated.

P.S. also similar difficulties when I use /sentry guard <name>

(i am starting to think its just a problem with any command that starts with /sentry)