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So i am having an issue when i go to hit anything with my stone axe my game client will crash. I'm using Hamachi to run a server with friends, yet they can all hit stuff with the axes and they don't crash. * The mods i have installed are backpack mod, Voxels map, and plenty'O biomes.

THE CRASH REPORT:

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Time: 12/10/14 4:07 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at net.minecraft.block.Block.isToolEffective(Block.java:1969)
at net.minecraft.item.ItemTool.getDigSpeed(ItemTool.java:127)
at net.minecraft.entity.player.EntityPlayer.getBreakSpeed(EntityPlayer.java:848)
at net.minecraftforge.common.ForgeHooks.blockStrength(ForgeHooks.java:159)
at net.minecraft.block.Block.func_180647_a(Block.java:467)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_180511_b(PlayerControllerMP.java:224)
at net.minecraft.client.Minecraft.func_147116_af(Minecraft.java:1435)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:2029)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1022)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:345)
at net.minecraft.client.main.Main.main(SourceFile:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.minecraft.block.Block.isToolEffective(Block.java:1969)
at net.minecraft.item.ItemTool.getDigSpeed(ItemTool.java:127)
at net.minecraft.entity.player.EntityPlayer.getBreakSpeed(EntityPlayer.java:848)
at net.minecraftforge.common.ForgeHooks.blockStrength(ForgeHooks.java:159)
at net.minecraft.block.Block.func_180647_a(Block.java:467)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_180511_b(PlayerControllerMP.java:224)
at net.minecraft.client.Minecraft.func_147116_af(Minecraft.java:1435)



ANY HELP WOULD BE MUCH APPRECIATED

You cut off a lot of useful info out of that report. Might want to submit the full version.