Help When ever I try to join the server my game crashes and goes back to the launcher
java.lang.NullPointerException:
at com.advGenetics.TileEntity.TileEntityDNABreeder.func_70316_g(TileEntityDNABreeder.java:227)
at net.minecraft.world.World.func_72939_s(World.java:2209)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1921)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:910)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:838)
at net.minecraft.client.main.Main.main(SourceFile:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(-2)
at sun.reflect.NativeMethodAccessorImpl.invoke(-1)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(-1)
at java.lang.reflect.Method.invoke(-1)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)