Use setBlockAndMetadataWithNotify(). It's a pain to convert it all...
You'll have to add two args(world, x,y,z, blockid, meta, notify);
meta is the metadata that goes along with your block, usually 0.
notify is critical here... it appears that it in most cases it should be a 2,
otherwise the block doesn't get updated to the client.
Don't use eclipse to make your changes. Use a real editor, then restart eclipse.
I used 'vim'. Much faster!
Good luck!