Oh man... you just got ripped off.

You should've asked this question before you deposited money there.

It is a classic scam to set up a fake exchange, make people deposit their money on it, and then cynically demand more bitcoins be deposited "so that it can be unlocked", but in reality what actually happens is that they don't return your coins, and instead have the audacity to ask you to deposit even more money for a different excuse, hoping that you fall for their lame requests for more money until you are broke.