menium stone and Philosopher's Stone

when i try and transmute blocks I can't i crasg f.x sand into sand
I get this

Caused by: java.lang.NullPointerException
	at net.minecraft.item.ItemStack.getItemDamage(ItemStack.java:268)
	at com.pahimar.ee3.core.handlers.EquivalencyHandler.areWorldEquivalent(EquivalencyHandler.java:237)
	at com.pahimar.ee3.core.handlers.WorldTransmutationHandler.onWorldTransmutationEvent(WorldTransmutationHandler.java:155)
	at net.minecraftforge.event.ASMEventHandler_12_WorldTransmutationHandler_onWorldTransmutationEvent_WorldTransmutationEvent.invoke(.dynamic)
	at net.minecraftforge.event.ASMEventHandler.invoke(ASMEventHandler.java:35)
	at net.minecraftforge.event.EventBus.post(EventBus.java:103)
	at com.pahimar.ee3.core.handlers.WorldTransmutationHandler.handleWorldTransmutation(WorldTransmutationHandler.java:107)
	at com.pahimar.ee3.network.packet.PacketRequestEvent.execute(PacketRequestEvent.java:83)
	at com.pahimar.ee3.network.PacketHandler.onPacketData(PacketHandler.java:41)
	at cpw.mods.fml.common.network.NetworkRegistry.handlePacket(NetworkRegistry.java:255)
	at cpw.mods.fml.common.network.NetworkRegistry.handleCustomPacket(NetworkRegistry.java:245)
	at cpw.mods.fml.common.network.FMLNetworkHandler.handlePacket250Packet(FMLNetworkHandler.java:84)
	at net.minecraft.network.NetServerHandler.handleCustomPayload(NetServerHandler.java:1098)
	at net.minecraft.network.packet.Packet250CustomPayload.processPacket(Packet250CustomPayload.java:70)
	at net.minecraft.network.MemoryConnection.processReadPackets(MemoryConnection.java:89)
	at net.minecraft.network.NetServerHandler.networkTick(NetServerHandler.java:134)
	at net.minecraft.network.NetworkListenThread.networkTick(NetworkListenThread.java:53)
	... 6 more