I do not want to have 1 mute bar at the beggining of the song. I delete this bar and cut the rest of bars in song and past it at the beggining. Song then begins immediately. But when I save the song and reopen it then there is again one bar mute at the beggining.
Help is welcome. Thanks.

First of all, it's a good idea to have an empty bar at the beginning, many have two or three of them. When you export to wav you can start the export anywhere you want.
 
If there is an empty bar, why don't you just drag the clips to the beginning? Or do you mean there's an empty clip?
Did you try selecting the track and the portion in the timeline and use "Cut - Delete hole?"
 
Did you check that the MIDI clip following the empty bar really begins at 2.0.0. or later, not one tick earlier?
 

Hi!
Thank you very much for your answer
I put a better description of the problem on this link:

Please, see if you can understand better my problem from this description. 
 

Sorry you cannot post links until you have around 30 posts on this forum, so there is no link in your post. 

You can probably post a link such as :

http <colon slash slash> forum <dot> cakewalk <dot> com <slash> Sonar-X1-Essentials-MIDI-edit-can-not-cut-first-bar-m3037507.aspx
 
with some copy/paste/edit .. we can still reach the link.