How to delete imported objects?

[mlegs]

Hi.. Does anyone know how to erase an element from an imported dwg?

This is what i made in other software (revit) and after I imported the model, as you can see I have no delete option nor "del" button works, luckily I can resize it so tiny that it almost becomes invisible but I would like to know how to delete, also. I admit that i am beginner in 3d max

 

Edit: PROBLEM SOLVED - i just restarted 3dmax

 

problem number 2: Did this ever happened to you ?I have a model made in Revit and the objects (walls) placed on a mass simply went in the center of the mass, after exporting to .3ds format. The problem is gone if I place a curtain wall system instead of walls. Anyone can help?

Thank you

Edited October 14, 2011 by mlegs