Bukkit

What steps will reproduce the problem?
1.continiosly repeating erorr
its happents every time when buildcraft quarry or pump is working. Please fix this problem

What version of the product are you using?
5.9.8

Do you have an error log of what happened?
[SEVERE] Could not pass event BlockBreakEvent to Regios v5.9.8
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:363)
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
    at yc.trySetBlockAndMetadata(World.java:819)
    at buildcraft.core.utils.BlockUtil.trySetBlock(BlockUtil.java:122)
    at buildcraft.core.utils.BlockUtil.trySetBlockWithNotify(BlockUtil.java:131)
    at buildcraft.factory.TileQuarry.positionReached(TileQuarry.java:413)
    at buildcraft.factory.TileQuarry.moveHead(TileQuarry.java:769)
    at buildcraft.factory.TileQuarry.g(TileQuarry.java:155)
    at yc.h(World.java:2607)
    at in.h(WorldServer.java:701)
    at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:844)
    at ho.r(DedicatedServer.java:309)
    at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:745)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:632)
    at fy.run(ThreadMinecraftServer.java:16)

Please provide any additional information below.
im using mcpc legacy 1.4.7 and buildcraft 3.4.3