2012-03-11 12:32:16 [SEVERE] [ecoCreature] Failed to load config: org.bukkit.configuration.InvalidConfigurationException: expected '', but found BlockMappingStart
in "", line 70, column 1:
system:
^

I don't know what's wrong... here's my config:
http://pastebin.com/ycbeQi0u||

I'm using Bukkit #2034, and ecoCreature v0.0.9e-b81
Thanks in advance.

Try and use a yml validator to find the syntax error in your config.