I have to ask who? I have created an wallet CLOAK in Bittrex. I have sent coins to it but so far still empty wallet. I asked Bittrex support but they have not responded.
My transaction details:
Status: 395 confirmations
Date: 7/5/2014 02:58
To: Bittrex BxTmSYLcQ6Fx6rscppLYVcbX7okT59tLfu
Debit: -237.483354 CLOAK
Transaction fee: -0.12 CLOAK
Net amount: -237.603354 CLOAK
Transaction ID: 97c06f82d86b4a72c5323ffd755805cb623afca8c41b3b9aee8ce33504e63c15
help me please !!! sorry my english is not good.

Just hold tight until you get a response from Bittrex. I had a similar issue with Mintpal and they cleared it up.