mffs.TileEntityReaktorMonitorClient cannot be cast to mffs.TileEntityPassivUpgrade

[Phanatic]

Title: mffs.TileEntityReaktorMonitorClient cannot be cast to mffs.TileEntityPassivUpgrade

Version: 3.0.3/3.0.4

OS: centos

Java Version: 7

Description of Problem:

tekkit 3.1.1 happens when player does this

Error Messages:

18:34:17 [sEVERE] java.lang.ClassCastException: mffs.TileEntityReaktorMonitorClient cannot be cast to mffs.TileEntityPassivUpgrade

18:34:17 [sEVERE] at mffs.TileEntityProjektor.checkupgrades(TileEntityProjektor.java:122)

18:34:17 [sEVERE] at mffs.TileEntityProjektor.q_(TileEntityProjektor.java:326)

18:34:17 [sEVERE] at net.minecraft.server.World.tickEntities(World.java:1190)

18:34:17 [sEVERE] at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:569)

18:34:17 [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467)

18:34:17 [sEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

18:34:17 [sEVERE] Unexpected exception

java.lang.ClassCastException: mffs.TileEntityReaktorMonitorClient cannot be cast to mffs.TileEntityPassivUpgrade

at mffs.TileEntityProjektor.checkupgrades(TileEntityProjektor.java:122)

at mffs.TileEntityProjektor.q_(TileEntityProjektor.java:326)

at net.minecraft.server.World.tickEntities(World.java:1190)

at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:569)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467)

at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

Error Log: