[Svetlmnw (OP)]

 Can someone help how to answer a new topic ??
 Maybe I'm not writing correctly?
Please help. 
 Yours faithfully.

[Colin2B]

If you are a serious user then just use the ‘Reply’ button (in black) which you can find either top or bottom of the post.
You can also use the Actions dropdown to quote the post.

If you are just here to troll or spam, don’t bother.