so i have set up an Openldap server by following the ubuntu server guide.

i followed the tutorial from the begining and worked my way to: Populating your database, and i added a user and a group. i never continued to the next part:Modifying the slapd configuration database.

so now i moved on to configure the client, so i followed the instruction further down on the page, under the headline: LDAP Authentication.

after that i reboot, at the login screen i select "Other"
i type in the user, which is john. itype in his password, then it tries to login for some seconds. but suddenly it puts me back at the login screen again, it doesnt give me any error message.

What could be causing this? and how do i solve it?