No,I use MultiBit Classic latest version.

https://blockchain.info/tx/a906777a8f4f81e4033d441d3bdf9bf0e94763cbe93c01f7104ee5ee325be59f

Try to import your private key to some other wallet software.
It will most likely show there because it have been sent...

I reached Member rank now and added the rank's signature code. Do I need to do something else or is it all?

Regarding my problem with withdrawal,now is solved by simply reset blockchain&transaction in MultiBit Classic.For some reason transaction was not visible in my wallet.

I think you need to change it to blockchain I have no problem withdrawing mine on blockchain it is always instant,Yobit is very transparent and they have an automated system,that s why sometimes takes sometimes to respond because they knew they have a very good system

My first 5 days is very good. i am using the coins i earned to trade on their platform instead of withdrawing them, a good way to learn trading using small amounts

Yes, there must be some problem on signature page of yobit, i also can't see my post counts even after reloading the page many times.

my post counts is correct but only that button not work...
I know it will be fixed soon but why this pb always happened?

Yep. we can't also do something except waiting, and i know it will be fixed soon as i have heard it before but experienced it for the 1st time.