possible bug with collisions

[haba]

Hey,

I'm implementing a gravity gun in my game, but I'm having some problems. Sometimes, when I'm trying to attract objects on the ground, the objects get stuck, and just after I collide with them, I'm able to attract them. Here's a small video showing the problem:

http://www.youtube.com/watch?v=8OBBIVMBLkg

Here I'm trying to attract the sphere on the ground (the sphere uses btSphereShape), and notice that, until I collide with the sphere, I'm not able to attract it.
Also, this only happens for some of the objects. For some of them the attraction works fine.
Any ideas?

Thanks!

[sparkprime]

maybe you need to activate the rigid bodies, otherwise they remain asleep to conserve CPU, i think it's rb->activate()