19:58:38 [INFO] SDDJ issued server command: /pet pig
19:58:38 [WARNING] [EchoPet] Task #23336 for EchoPet v1.0 generated an exception
java.lang.NoClassDefFoundError: org/bukkit/craftbukkit/v1_4_R1/entity/CraftEntity
        at me.dsh105.echopet.EchoPetNav$1.run(EchoPetNav.java:103)
        at org.bukkit.craftbukkit.v1_5_R1.scheduler.CraftTask.run(CraftTask.java:53)
        at org.bukkit.craftbukkit.v1_5_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:344)
        at net.minecraft.server.v1_5_R1.MinecraftServer.r(MinecraftServer.java:512)
        at net.minecraft.server.v1_5_R1.DedicatedServer.r(DedicatedServer.java:225)
        at net.minecraft.server.v1_5_R1.MinecraftServer.q(MinecraftServer.java:476)
        at net.minecraft.server.v1_5_R1.MinecraftServer.run(MinecraftServer.java:409)
        at net.minecraft.server.v1_5_R1.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.ClassNotFoundException: org.bukkit.craftbukkit.v1_4_R1.entity.CraftEntity
        at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:70)
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
        ... 8 more