I have it rank players to 'DragonSlayer' when they kill the enderdragon, no matter what rank they are, but it's not working.
Below is what I use to try to rank the players. Also, I DO have stats enabled and working.

DragonSlayer:
requirements:
mobs killed:
value: 1:ENDER_DRAGON
results:
rank change: DragonSlayer
command: 'say &p just got a promoted to DragonSlayer!;'
message: 'Congratulations, you are now a DragonSlayer.'

Hmm, can you restart your server and then give me the server.log that contains all output from the startup?

Where is the server.log located?

Search for the logs folder in your main folder and then click on latest.log

Turning it back on now

http://pastie.org/9108860

It seems to startup fine. What is the output of /ar debug?

http://pastie.org/9108865

I do just want to say you guys reply so fast, and are extremely helpful.

Seems fine as well. Can you temporarily try to use a different mob and see if that works. I want to test something.

What are some mob names?

Didn't work; I tried using a creeper

If it helps the player was in the rank Builder

Ah, the player needs to be in the group DragonSlayer. That's what you set it to, right?

Use a ';' instead of a ':' at the value line.

so do value: 1;ENDER_DRAGON

Yeah, exactly.

I'll try it

It didn't work

DragonSlayer:
requirements:
mobs killed:
value: 1;ENDER_DRAGON
results:
rank change: DragonSlayer
command: 'say &p just got a promoted to DragonSlayer!;'
message: 'Congratulations, you are now a DragonSlayer.'

If you do /ar check playername
It doesn't say that they have any requirements to rank up

Hmm, can you show me your whole config and permission config?

Permissions Config: http://pastie.org/9108841

Does it throw any errors at startup?

Nope

Can you show me your permissions file? The one used by your permissions plugin?

Yes

http://pastie.org/9108850

Sorry for not replying, I had homeschool.
Yes, I need players to be ranked up to DragonSlayer when they kill the Ender_Dragon.

Ah, I think you got it backward then.

Only players that are in the dragonslayer group will be able to complete the requirement.

So if you're not in the group, killing an ender dragon won't do anything.

Ohhhhh, haha.
Okay, so how would I rank someone to any group after killing any achievement?

EG. If someone is in any group, how could I rank them to dragonslayer?

Well, that's not possible yet. I'll be adding this feature in the future.

Oh. So there's nothing I can do in a meantime?

No, not really.

I can hopefully add this real soon so you can download a development build

Alright, please let me know when you add it. I do love this plugin, I switcher here from RankSuite because their lack of support and all the bugs they have

I'll sure do ;)

Suggestion: When ranking up to a new rank, and a player has multiple ranks, can you make it so we can add a list of ranks that do not get changed?