Choice for "player at bottom" disabled ?

[Erkson]

I was watching a movie lin file with BBO software, and saw that the player at bottom was always the declarer.

 

I don't want that. I want South at bottom.

 

I see that there is a checkbox to change that. Here "declarer at bottom" is checked, and I can't change it because the checkbox is grayed.

 

Could you tell me what can I do ?

 

EDITED AT 11:29 UTC :

problem is solved.

You can't change the "player at bottom" when watching offline a movie, but you can change it when connected to BBO.

 

Erkson