Docking result

Dear All

I would like to get answers for the following questions:

1) How can I view which residue is involved in an binding interface after zdock running?

2) I' ve tried to refine zdock results with rdock. I applied Charm H polar force field and i get The followiong error

   Unknown atom type ARG:HE2 for ACE solvation calculation in residue  :ARG251

How can I fix it? If I clean protein, the force field is removed

3) How can I save a ligand-receptor docked pose to a pdb file?

Thanks in advance