Physics Enabled

Hi all, 

Okay, I have one physics object created in the Corona Composer and another created in scene.lua using spriteSheet with physics enabled. 

I have collision detection working a bit tedious to figure out exactly what I want.  But if i comment out the collision detection shouldn’t my object1 and object2 still interact with each other without collision detection ?

Yes object1 in composer is static and object2 in .lua file is dynamic… but when object2 moves down screen it does not bounce off of object1…

However if i created a third object in composer and make it dynamic with a joint I can bounce it off of object1 at will…

So, shouldn’t the same hold true for object1 and object2 as object1 and object3 ??

Really confused about physics being enabled ! what is the point ?

Any help ! thanks 

JZ