GROUPMANAGER help please

my Group manager is being a DICK and i want to Know if anyone knows how to Fix it With out having to Delete the whole YML but is Says:

2013-03-07 23-32
=============================== GM ERROR LOG ===============================
= ERROR REPORT START - 2.0 (2.9.6) (Phoenix) =

java.lang.IllegalArgumentException: The following file couldn't pass on Parser.
pluginsGroupManagerworldsworldgroups.yml
at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:497)
at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:417)
at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:629)
at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:591)
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:163)
at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:87)
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_4_R1.CraftServer.loadPlugin(CraftServer.java:282)
at org.bukkit.craftbukkit.v1_4_R1.CraftServer.enablePlugins(CraftServer.java:264)
at org.bukkit.craftbukkit.v1_4_R1.CraftServer.reload(CraftServer.java:596)
at org.bukkit.Bukkit.reload(Bukkit.java:184)
at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:23)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:186)
at org.bukkit.craftbukkit.v1_4_R1.CraftServer.dispatchCommand(CraftServer.java:514)
at org.bukkit.craftbukkit.v1_4_R1.CraftServer.dispatchServerCommand(CraftServer.java:506)
at net.minecraft.server.v1_4_R1.DedicatedServer.al(DedicatedServer.java:260)
at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:225)
at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: while scanning a simple key
in "<reader>", line 69, column 5:
essentials.feed
^
could not found expected ':'
in "<reader>", line 70, column 5:
inheritance:
^

at org.yaml.snakeyaml.scanner.ScannerImpl.stalePossibleSimpleKeys(ScannerImpl.java:398)
at org.yaml.snakeyaml.scanner.ScannerImpl.needMoreTokens(ScannerImpl.java:229)
at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:178)
at org.yaml.snakeyaml.parser.ParserImpl$ParseBlockMappingValue.produce(ParserImpl.java:591)
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.composeNode(Composer.java:133)
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.composeMappingNode(Composer.java:237)
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:492)
... 25 more

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can some one Tell me this in English please or tell me a Solution