server group manager error

4:13:21 [SEVERE] GroupManager - SEVERE - ===================================================
2013-04-28 14:13:22 [SEVERE] Error occurred while enabling GroupManager v2.0 (2.10.1) (Phoenix) (Is it up to date?)
java.lang.IllegalArgumentException: The following file couldn't pass on Parser.
plugins\GroupManager\worlds\world\groups.yml
	at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:238)
	at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:93)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:457)
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
	at org.bukkit.craftbukkit.v1_5_R2.CraftServer.loadPlugin(CraftServer.java:282)
	at org.bukkit.craftbukkit.v1_5_R2.CraftServer.enablePlugins(CraftServer.java:264)
	at net.minecraft.server.v1_5_R2.MinecraftServer.j(MinecraftServer.java:303)
	at net.minecraft.server.v1_5_R2.MinecraftServer.e(MinecraftServer.java:282)
	at net.minecraft.server.v1_5_R2.MinecraftServer.a(MinecraftServer.java:242)
	at net.minecraft.server.v1_5_R2.DedicatedServer.init(DedicatedServer.java:150)
	at net.minecraft.server.v1_5_R2.MinecraftServer.run(MinecraftServer.java:381)
	at net.minecraft.server.v1_5_R2.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.IllegalArgumentException: The following file couldn't pass on Parser.
plugins\GroupManager\worlds\world\groups.yml
	at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:496)
	at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:416)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:637)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:599)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.initialWorldLoading(WorldsHolder.java:88)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.initialLoad(WorldsHolder.java:78)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.resetWorldsHolder(WorldsHolder.java:70)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.<init>(WorldsHolder.java:59)
	at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:169)
	... 12 more
Caused by: while parsing a block mapping
 in "<reader>", line 12, column 3:
      VIP:
      ^
expected <block end>, but found BlockSequenceStart
 in "<reader>", line 285, column 4:
       -  essentials.warp
       ^

	at org.yaml.snakeyaml.parser.ParserImpl$ParseBlockMappingKey.produce(ParserImpl.java:575)
	at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:161)
	at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:146)
	at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:230)
	at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:160)
	at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:237)
	at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:160)
	at org.yaml.snakeyaml.composer.Composer.composeDocument(Composer.java:123)
	at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:106)
	at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:121)
	at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:480)
	at org.yaml.snakeyaml.Yaml.load(Yaml.java:423)
	at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:491)
	... 20 more