I can't able to place sell orders in any way!!!? Whats wrong?
there are strict rules for selling.
only a specific amount per price. and you have to find a free slot to place you order.
It's basically a scam from Yobit to hang on to your Bitcoins. You will be able to buy but you can never sell, there are no slots left to sell within a realistic price range and the volume is so low that you will never reach your slot and then you can only sell a tiny amount. I have said this before and I say it again that this is a scam and asked for a comment from YoBit but they refuse to comment on this fact that most people will never be able to sell. It's a marketing ploy "Rise Only Market", it's people excited with the "Rise Only" but you forget to read the small print.
Unless they open the trading you have effectively lost your Bitcoins, and now that Bitcoin is on he rise there is no way that YoBit will open trading. They are probably trading with your Bitcoins right now.