[1.3][SMP] Failure on computer boot

When I first right click a computer upon placing it I get this in the server console:

2012-03-09 03:06:41 [SEVERE] Exception in thread "Thread-1393"
2012-03-09 03:06:41 [SEVERE] java.lang.NoClassDefFoundError: org/luaj/vm2/compiler/LexState
2012-03-09 03:06:41 [SEVERE] at org.luaj.vm2.compiler.LuaC.luaY_parser(LuaC.java:211)
2012-03-09 03:06:41 [SEVERE] at org.luaj.vm2.compiler.LuaC.compile(LuaC.java:206)
2012-03-09 03:06:41 [SEVERE] at org.luaj.vm2.compiler.LuaC.load(LuaC.java:197)
2012-03-09 03:06:41 [SEVERE] at org.luaj.vm2.LoadState.load(LoadState.java:364)
2012-03-09 03:06:41 [SEVERE] at org.luaj.vm2.lib.BaseLib.loadStream(BaseLib.java:401)
2012-03-09 03:06:41 [SEVERE] at org.luaj.vm2.lib.BaseLib$BaseLibV.invoke(BaseLib.java:247)
2012-03-09 03:06:41 [SEVERE] at org.luaj.vm2.lib.VarArgFunction.call(VarArgFunction.java:66)
2012-03-09 03:06:41 [SEVERE] at dan200.computer.shared.Computer.initLua(Computer.java:1672)
2012-03-09 03:06:41 [SEVERE] at dan200.computer.shared.Computer.access$31(Computer.java:957)
2012-03-09 03:06:41 [SEVERE] at dan200.computer.shared.Computer$58.execute(Computer.java:1823)
2012-03-09 03:06:41 [SEVERE] at dan200.computer.shared.ComputerThread$1$1.run(ComputerThread.java:45)
2012-03-09 03:06:41 [SEVERE] at java.lang.Thread.run(Unknown Source)

The computer never starts, just black screen. This is a Tekkit install. I'd really appreciate some help!

This is not a bug.

Assuming this is the FIRST computer you are placing, I'd say you are missing some of the files in your ComputerCraft directory; try reinstalling it.

If not, feel free to open a topic in the correct forum.