08:25:27 [SEVERE] Could not pass event BLOCK_PISTON_EXTEND to FalseBookIC
java.lang.ClassCastException: org.bukkit.material.MaterialData cannot be cast to org.bukkit.material.PistonBaseMaterial
        at org.bukkit.event.block.BlockPistonEvent.getDirection(BlockPistonEvent.java:41)
        at org.bukkit.event.block.BlockPistonExtendEvent.getBlocks(BlockPistonExtendEvent.java:37)
        at com.gemo.FalseBook.IC.FalseBookICBlockListener.onBlockPistonExtend(FalseBookICBlockListener.java:108)
        at org.bukkit.plugin.java.JavaPluginLoader$45.execute(JavaPluginLoader.java:554)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:339)
        at net.minecraft.server.BlockPiston.g(BlockPiston.java:70)
        at net.minecraft.server.BlockPiston.doPhysics(BlockPiston.java:47)
        at net.minecraft.server.World.k(World.java:488)
        at net.minecraft.server.World.applyPhysics(World.java:467)
        at net.minecraft.server.BlockRedstoneWire.g(BlockRedstoneWire.java:49)
        at net.minecraft.server.BlockRedstoneWire.doPhysics(BlockRedstoneWire.java:286)
        at net.minecraft.server.World.k(World.java:488)
        at net.minecraft.server.World.applyPhysics(World.java:466)
        at net.minecraft.server.BlockRedstoneTorch.a(BlockRedstoneTorch.java:56)
        at net.minecraft.server.Chunk.a(Chunk.java:358)
        at net.minecraft.server.World.setRawTypeIdAndData(World.java:316)
        at net.minecraft.server.World.setTypeIdAndData(World.java:414)
        at net.minecraft.server.BlockRedstoneTorch.a(BlockRedstoneTorch.java:142)
        at net.minecraft.server.World.i(World.java:1891)
        at net.minecraft.server.World.doTick(World.java:1638)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:461)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:374)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)