APEX

I tried authenticating user against infromation stored in Database tables dont know whats the problem its not working, I followed all the required steps for that but not succeed. So I decided to validate the user against LDAP or Active directory. Can anyone tell me how to configure LDAP or Active Directory in Windows XP.

Please help me out as only one day remained for to submit my project, everything is done except the login page.

And I dont think I may get even grade C if there is no security for the application. Please help me out in configuring Active Directory or LDAP and ASAP please.