Why when i hit polygrups > Grop visible nothing happen
Are you sure that nothing is happening? Even if you switch on Polyframe to actually see the Polygroups?
maybe everything is visible.
look like it make polygrups but the with no color
change also the material to flat to check your polyframe.
just to defence my self
i lost all the time 
Draw Polyfream Wasn’t ON 
oo:o
That was funny
Lol … i knew it!!!
That fixed it for me!!!
Thanks