How to create customer account contact person?

hi,
i'm having some problems on properly creating a customer account contact person. we use R12 (12.1.1).

the sequence is use is i create first an organization, then create an account, account site and account site use. i have no problems in these parts. now, normally i should be able to create a contact person on the site level. unfortunately my code doesn't seem to work. please see my code below for creating the org contact.

---

  /*
  || Create Site Level Contact
  */

  -- Create Contact Person

  p_person_rec.person_first_name := 'Allen';
  p_person_rec.person_last_name := 'Sandiego';
  p_person_rec.created_by_module := g_created_by_module;