Need suggestions

Dear all, 
I've just recently started learning to simulate with Materials Studio , and I've run into a lot of questions that I'd appreciate answers to from seniors. My system has an amino group and an aldehyde group generating an imine bond, so I need to modify Jason senior's version, but I've checked the tutorials and I'm still clueless. Another problem is that no matter if I increase the number of molecules or the reaction radius, no crosslinking occurs. Can anyone help me?