Dynamics in CC4: such great upgrade!...
Unfortunately, I can just see them playing in the viewport (looking great), but not after exporting my render... 
Any ideas why?
PS I have been able to export them on simple scenes with just dynamics on one asset (hair)
Bun in a more complex scene with a few clothes with physics, it's just failing to export...
Is there probably a setting I'm missing?
Thanks. 

SOLVED!
Hey! super quick update:
just like in iClone and other software that allows for simulation: you have to start rendering from frame 1. 
The good news? 
You CAN render simulation and even select a Range, 
the bad news?
You can only trim the ending of your video and not the beggining...
So, in my case, I will need to take it to a external editor, but at least the shot is looking the way I planned it.