[MCL-1353] Can't play 1.6.2 on 1.1.1

I tried to use the 1.1.1 launcher, when I'm trying to play Minecraft this happens

Fatal error launching game. Report this to http://mojang.atlassian.net please!
java.lang.NullPointerException
	at net.minecraft.launcher.GameLauncher.getMinecraftArguments(GameLauncher.java:317)
	at net.minecraft.launcher.GameLauncher.launchGame(GameLauncher.java:253)
	at net.minecraft.launcher.GameLauncher.onDownloadJobFinished(GameLauncher.java:511)
	at net.minecraft.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:112)
	at net.minecraft.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:10)
	at net.minecraft.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:84)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)