Question Probleme Hut Explosion

Hi every one,

I did a kind of hut on 3dsmax and i would like to explode it,
for that i had a capsule collidor and get Explosion into Playmaker,
My problem are the next :
- when kinematic for cabana elements if disable, all inter-choc and explode before the capsule collidor,
- when kinematic is enable, i don't know how to disable it when 'grenade' active,

I uploaded screen

Thank you,
Best regards,
Hugo