java.lang.NoSuchFieldError: defaultVolume
    at gravisuite.ItemAdvancedJetPack.onArmorTick(ItemAdvancedJetPack.java:127)
    at gravisuite.ItemAdvancedNanoChestPlate.onArmorTick(ItemAdvancedNanoChestPlate.java:69)
    at net.minecraft.entity.player.InventoryPlayer.func_70429_k(InventoryPlayer.java:319)
    at net.minecraft.entity.player.EntityPlayer.func_70636_d(EntityPlayer.java:538)
    at net.minecraft.client.entity.EntityPlayerSP.func_70636_d(EntityPlayerSP.java:287)
    at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:1609)
    at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:288)
    at net.minecraft.client.entity.EntityClientPlayerMP.func_70071_h_(SourceFile:63)
    at net.minecraft.world.World.func_72866_a(World.java:2043)
    at net.minecraft.world.World.func_72870_g(World.java:2007)
    at net.minecraft.world.World.func_72939_s(World.java:1860)
    at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1995)
    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:962)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:887)
    at net.minecraft.client.main.Main.main(SourceFile:148)
    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:134)
    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 gravisuite.ItemAdvancedJetPack.onArmorTick(ItemAdvancedJetPack.java:127)
    at gravisuite.ItemAdvancedNanoChestPlate.onArmorTick(ItemAdvancedNanoChestPlate.java:69)
    at net.minecraft.entity.player.InventoryPlayer.func_70429_k(InventoryPlayer.java:319)
    at net.minecraft.entity.player.EntityPlayer.func_70636_d(EntityPlayer.java:538)
    at net.minecraft.client.entity.EntityPlayerSP.func_70636_d(EntityPlayerSP.java:287)
    at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:1609)
    at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:288)
    at net.minecraft.client.entity.EntityClientPlayerMP.func_70071_h_(SourceFile:63)
    at net.minecraft.world.World.func_72866_a(World.java:2043)
    at net.minecraft.world.World.func_72870_g(World.java:2007)

-- Entity being ticked --
Details:
    Entity Type: null (net.minecraft.client.entity.EntityClientPlayerMP)
    Entity ID: 160
    Entity Name: MatiXOR
    Entity's Exact location: -863,61, 59,98, 172,36
    Entity's Block location: World: (-864,59,172), Chunk: (at 0,3,12 in -54,10; contains blocks -864,0,160 to -849,255,175), Region: (-2,0; contains chunks -64,0 to -33,31, blocks -1024,0,0 to -513,255,511)
    Entity's Momentum: 0,00, 0,56, 0,00
Stacktrace:
    at net.minecraft.world.World.func_72939_s(World.java:1860)