Board Thread:Questions and Answers/@comment-5878752-20121216183318/@comment-139.142.154.105-20121217194026

So your playing single player? well obviously it doesnt work, all other worlds are stopped when your in a world, to reduce lag, if the nether and the overworld were loaded at the same time on a common computer it would cause a lot of lag, that is why most servers disable nether also.