Your private key is vulnerable. You are sending a private key to the network. Hackers are aiming for this. To protect your funds, we locked your account. To retreive your funds, a) Prepare new simple wallet b) Prepare a screenshot of the account screen in your NanoWallet. If a certain amount is exceeded, more detailed identification may be requested (one or more of SMS, id scan, selfie holding your id, skype call) c) Post a message in the forum https://forum.nem.io/t/8147/