Bukkit

What steps will reproduce the problem?
1. Well, when I uploaded it to the server, It immediately became one of the most used plugins on the server, with about 5 people asking it stupid and random questions at the same time, but after the automatic server restart about a hour later, one of the players told me it had stopped working, so I tryed saying "Vai hello?"
Nothing happend. o.o
Maybe it has something to do with too many questions being asked within a timeframe?

What is the expected output? What do you see instead?
When I say vai Hello? It normally says something along the lines of "Hi there!"
But I am seeing nothing ._.

What version of the product are you using?
VAI v0.3 - Bot "Charlie" ID: e222218f9e356398

Do you have an error log of what happened?
This was the first recorded breakdown. All the other bots I tryed after it were the same.
This is from a multicraft server so you have to read from bottom to top :)

01.09 04:43:20 [Server] INFO [Co-Owner]~KawaiiMcNuggs: I'll go check console :D
01.09 04:43:11 [Server] INFO [Citizen]~iliekapplepie: Well, I'm not the one who asks stupid questions ._.
01.09 04:43:05 [Server] INFO [Co-Owner]~KawaiiMcNuggs: I think you guys killed vai with all your dumb questions ;_;
01.09 04:43:01 [Server] INFO [JnrMod]~JustinMcNuggs: Fuck you, it was just a joke!
01.09 04:42:57 [Server] INFO [Citizen]~iliekapplepie: Justin you killed vai when you asked if he was a prostitute you moron!
01.09 04:42:53 [Server] WARN at com.danielrharris.vai.VAIThread.run(VAIThread.java:16)
01.09 04:42:53 [Server] WARN at com.danielrharris.vai.VAI.handle(VAI.java:87)
01.09 04:42:53 [Server] WARN at com.google.code.chatterbotapi.Session.think(Session.java:27)
01.09 04:42:53 [Server] WARN java.lang.IllegalAccessError: tried to access class com.google.code.chatterbotapi.Utils from class com.google.code.chatterbotapi.Session
01.09 04:42:53 [Server] WARN Exception in thread "Thread-38"
01.09 04:42:52 [Server] INFO [Co-Owner]~KawaiiMcNuggs: vai are you there?
01.09 04:42:43 [Server] INFO VAI v0.3 Reloaded and enabled!
01.09 04:42:43 [Server] INFO Enabling VAI v0.3
01.09 04:42:42 [Server] INFO Disabling VAI v0.3
01.09 04:42:39 [Server] INFO [Co-Owner]~KawaiiMcNuggs: I'll try reload him okay, gimme a sec :)
01.09 04:42:08 [Server] INFO [Co-Owner]~KawaiiMcNuggs: I think vai did a brain fart and died guys o.o

Please provide any additional information below.
I have tryed 4 other bots, alice, lauren and another one from the pandora site with all the same results ._.
I have tryed reinstalling it about 6 times now with the same error message popping up in console o.o
Ran it for about an hour perfectly before this happend ;_; -
The server game version is 1.7.2 Bukkit
It ran fine for an hour... ;_;
Perhaps google or whatever company hosts the bots got angry with us asking stupid questions at it ._.