crash

*** Minecraft Coder Pack Version 2.11 ***
MCP 2.11 running in c:\mcp
Compiling Minecraft
sources\minecraft\net\minecraft\src\mod_Chemistry.java:95: cannot find symbol
symbol  : variable shiftedIndex
location: class net.minecraft.src.Block
                ModLoader.AddSmelting(BlockSulfur.shiftedIndex, new ItemStack(It
emSulfurStick,8));
                                                 ^
1 error
*** minecraft_server.jar was not found, skipping
=== MCP 2.11 recompile script finished ===
Press any key to continue . . .