cant load the world in 1.6.4

[fungreenfox]

mv load vaudeville
19:55:34 [INFO] [Subterranea] Subterranea loaded for world vaudeville
19:55:34 [WARNING] [Multiverse-Core] Failed to set the generator for world 'vaudeville' to 'Subterranea:-underground-biomes true -silverfish false -giant-caves sxz=500,sy=175,cutoff=65,miny=10, maxy=180': java.
lang.NoClassDefFoundError: net/minecraft/server/v1_6_R2/WorldProvider
19:55:34 [WARNING] [Multiverse-Core] This is a bug in the generator plugin, NOT a bug in Multiverse!
19:55:34 [INFO] Error trying to load world 'vaudeville'!

[rmichela]

Updated for 1.6.4