Is it possible to visualize and determine which residues interact during protein-protein docking?

I have tried the Draw receptor-ligand feature in the Analyze Binding Site tool however, Accelrys gives back the following message:

Invalid selection for 2D ligand. A valid selection consists of a Molecule, Chain, or multiple Residue objects with at most 1000 atoms bound in a single connected unit.

What should I do?

Thanks.