[Support] Ic2 Batpack

    MY MINECRAFT KEEEPS CRASING AND GIVING ME SAVING CHUNKS AND I GET THIS I THINK ITS SOMETHING TO DO WITH BATPACK COZ OF THE FIRST LINE BUT I DONT UNDERSTAND THIS SO I NEED HELP PLZ!



    java.lang.AbstractMethodError: ic2.common.ItemArmorBatpack.getProperties(Lxb;Lll;Lyq;I)Lforge/ArmorProperties;
    at xb.c(EntityPlayer.java:842)
    at aar.a(EntityLiving.java:499)
    at xb.a(EntityPlayer.java:744)
    at aar.e(EntityLiving.java:717)
    at xb.e(EntityPlayer.java:1413)
    at ms.a(Entity.java:664)
    at ms.b(Entity.java:543)
    at uh.b(SourceFile:60)
    at aar.a_(EntityLiving.java:811)
    at xb.a_(EntityPlayer.java:1310)
    at aar.d(EntityLiving.java:1003)
    at xb.d(EntityPlayer.java:395)
    at uh.d(SourceFile:209)
    at aar.B_(EntityLiving.java:375)
    at xb.B_(EntityPlayer.java:198)
    at vq.a(World.java:1672)
    at vq.f(World.java:1647)
    at vq.m(World.java:1545)
    at net.minecraft.client.Minecraft.k(SourceFile:1594)
    at net.minecraft.client.Minecraft.x(SourceFile:709)
    at net.minecraft.client.Minecraft.run(SourceFile:662)
    at java.lang.Thread.run(Unknown Source)
    --- END ERROR REPORT ca8c7be3 ----------

    after i did that this happenes



    java.lang.NoSuchMethodError: forge.ForgeHooks.onItemPickup(Lxb;Lfj;)Z
    at fj.a(EntityItem.java:144)
    at xb.l(EntityPlayer.java:438)
    at xb.d(EntityPlayer.java:429)
    at uh.d(SourceFile:209)
    at aar.B_(EntityLiving.java:375)
    at xb.B_(EntityPlayer.java:198)
    at vq.a(World.java:1672)
    at vq.f(World.java:1647)
    at vq.m(World.java:1545)
    at net.minecraft.client.Minecraft.k(SourceFile:1594)
    at net.minecraft.client.Minecraft.x(SourceFile:709)
    at net.minecraft.client.Minecraft.run(SourceFile:662)
    at java.lang.Thread.run(Unknown Source)
    --- END ERROR REPORT 17abb9e8 ----------