How to access advanced collections

Hi we are on r12,12.1.1 and I am trying to access advanced collections. I understand there are some responsibilities like collections agent, manager and administrator.

 I have system administrator and i gave myself the above responsibilities. I imported my fnd user into as a resource ,and gave myself the roles like sales manager, representative, admin etc.

But still when i try to access the collections agent responsibilities, i get the error,

"the user id has not been setup as a sales force"

Please let me know what is the step that I am missing here.

Thanks,Lakshmi N Jagarlapudi.