Hi Mala,

re:
> The rings...

It helps a lot if you can please post the .3dm model file for your objects instead of a screenshot.

With the .3dm model file there is a lot more that can be done like I can rotate around and examine your objects and figure out what's going on. With a screenshot I'll usually have to make a guess at what is going on instead of being able to examine your particular case.

Thanks, - Michael