Your best bet is going to be going to someone on the LDAP team to have them give you the correct information to access things, they are going to be the experts, not us.
That being said, I want to clarify something as well, what you are trying to do is actually pull data from your LDAP via the Load Script and NOT configure a Directory Service DSP? Either way, I would expect your LDAP admins are the guys to best help you here.
To help users find verified answers, please do not forget to use the "Accept as Solution" button on any post(s) that helped you resolve your problem or question. I now work a compressed schedule, Tuesday, Wednesday and Thursday, so those will be the days I will reply to any follow-up posts.