Zone Help im stuck

ok i dont understand this if i make a zone and i set it so the building with in it cant be destroyed and then i set it as a safe zone i can walk out the zone pull out a shotgun come back in to the zone and destroy the building.

im sorry if this is a easy thing to fix but i just cant work it out for the life of me i tried in admin as well none admin and same thing i looked at the perms and i have ignore off for it i reloaded the plugin and still same thing.

Thank you in advance for all your help.

are you trying to make a building unbreakable?

yer i am sorry for the late replay i have been super busy 

i sugest TruePVE for that, it can b eused in combo with Zone Manager