I went to minecon 2013 and got a cape i (loved) it allot

I love minecraft version 1.6.4 i was playing some crazycraft with a couple of friends and we decided to go play 21b we first modified files over skype and messing with them to get 21b online we eventually got it to work with bukkit perfectly but a friend wondered were my cape was, i told him 21b probly don't support capes yet don't worry. we continue playing for 2hrs and i leave to check my 1.7.9 server... i noticed my cape was still gone.. i was worried so i deleted all my mods and reset minecraft completely.. (Deleted .minecraft) rebooted and still no cape ;( no im here mad at 21b because it stole my cape... is there any suggestions?

I looked in my setting "Show Cape" it was "ON" restarted mc 10 times..

I just want my cape back