authenticating in parent domain by using child domain user?

I created a child domain and trying to login on parent domain with a user of child domain.

I am doing login attempt on Wi开发者_StackOverflowndows Login Dialog at PDC of parent domain.

Login is failing as parent domain could not authenticate user of child domain.

Is it possible to login in this way? If yes, the how can i achive it?

Notes:-

Both are Windows 2003 domains. child domain is direct child of parent domain. There is 2-way transitive trust between child and parent (created automatically).

Yes, you can logon a parent domain using a child domain user.

Domain controller is kind of special. Unlike a regular member server, normal user cannot logon to the domain controller by default.

You need to setup the group policy to enable that. This MSDN article explains how to do that. Basically, you need to go to Default Domain Controller Security Policy and under the User Rights Assignment, add the AD user or AD group to Allow log on locally settings.