Проблема с запуском Minecraft 1.6!

2 Июля, я скачал Minecraft 1.6. , но когда я её скачал. И я её хотел запустить, вышла ошибка, и пишет:

Launching game
Looking for old natives to clean up...
Deleting C:\Documents and Settings\Admin\Application Data\.minecraft\versions\1.6.1\1.6.1-natives-14654920824639
Unpacking natives to C:\Documents and Settings\Admin\Application Data\.minecraft\versions\1.6.1\1.6.1-natives-14699576526496
Couldn't unpack natives!
java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.(Unknown Source)
at java.util.zip.ZipFile.(Unknown Source)
at net.minecraft.launcher.GameLauncher.unpackNatives(GameLauncher.java:322)
at net.minecraft.launcher.GameLauncher.launchGame(GameLauncher.java:165)
at net.minecraft.launcher.GameLauncher.onDownloadJobFinished(GameLauncher.java:447)
at net.minecraft.launcher.updater.download.DownloadJob.startDownloading(DownloadJob.java:56)
at net.minecraft.launcher.Launcher$1.run(Launcher.java:151)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)