It may be a possibility that you have to update your server to the latest edition. Go to minecraft.net to download the latest server version. After you make sure you have the latest version, if it still won't work check the command line in the server window when you try to connect: it may give you a hint on what went wrong.
what you do is press escape or Esc on your keyboard that will make minecraft pause. Then go to options the change to difficulty to hard wait for night then wait for something to kill you. After you respawn change it back to easy or peaceful or what you were playing on.
that depends on the version and edition of minecraft you are playing.
Unfortunately, you can not change your name on Minecraft!
You can change your minecraft clothes if you change your skin or download a mod.
Your minecraft skin is not one you buy. You customize it on www.minecraft.net. Log in, Click on Profile, and change it to anything you want.
Sadly, you cant change your minecraft e-mail
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Look up the default controls on the minecraft wiki page, go to the control settings in minecraft, and change them.
If you bought Minecraft. If you don't know, they're called 'Skins'. Go to their site and hit the 'Skins' tab then search for a look you like, click it and press 'Change skin'. This will redirect you to related site and will ask you if you would like to change your skin to the one specified. This might take you to the Minecraft.net homepage first, so you may need to try again. Click 'Change' to change your skin. Just so you know, you must be online in Minecraft for your skin to appear. If you are playing in Offline Mode, you will be set with the default steve skin. So yes, you CAN change costumes in Minecraft.
No, they do not.