Thanks for your answer.
Now that I ve decided to post a thread on the technical support, it started to work :) blocks are synced and I am registered according to my client. Hurray!

Please help, I am struggling with it for weeks already :-[
My client version is 0.6.0. It says  "Not registered on the blockchain"
Although, I have checked that I am. Tried to register through Facebook again. But my client doesn't allow that - account name taken....