everything seems to work but….

Hi peops, I am working with the article of adintegration. lookup allUsers works just fine 1018 entrys i could use the default users in ad but i dont see a prob whit that. now for the kewl thing: I login whit a domain registerd account and it seems to work untill... i get a text login :s So far that. The basic problem is probably that i didnt map anything but i cant find a clear explanation on how things are mapped. Can someone help me out? thx peops