DVT Error

net.minecraft.server.v1_5_R2.ThreadServerApplication.run(SourceFile:573)
31.03 23:37:25 [Server] INFO at net.minecraft.server.v1_5_R2.MinecraftServer.run(MinecraftServer.java:407)
31.03 23:37:25 [Server] INFO at net.minecraft.server.v1_5_R2.MinecraftServer.q(MinecraftServer.java:474)
31.03 23:37:25 [Server] INFO at net.minecraft.server.v1_5_R2.DedicatedServer.r(DedicatedServer.java:225)
31.03 23:37:25 [Server] INFO at net.minecraft.server.v1_5_R2.MinecraftServer.r(MinecraftServer.java:510)
31.03 23:37:25 [Server] INFO at org.bukkit.craftbukkit.v1_5_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:344)
31.03 23:37:25 [Server] INFO at org.bukkit.craftbukkit.v1_5_R2.scheduler.CraftTask.run(CraftTask.java:53)
31.03 23:37:25 [Server] INFO at me.gcflames5.DTV.DefendTheVillager$3.run(DefendTheVillager.java:355)
31.03 23:37:25 [Server] INFO at me.gcflames5.DTV.DefendTheVillager.startGame(DefendTheVillager.java:270)
31.03 23:37:25 [Server] INFO at org.bukkit.craftbukkit.v1_5_R2.entity.CraftLivingEntity.setHealth(CraftLivingEntity.java:73)
31.03 23:37:25 [Server] INFO java.lang.IllegalArgumentException: Health must be between 0 and 20
31.03 23:37:25 [Server] WARNING [Defend The Villager] Task #2377 for Defend The Villager v1.0 generated an exception
31.03 23:36:55 [Server] INFO Defend The Villager Lobby has stared! Type /dtvJoin!