Authenticate user against active directory in ASP.NET

Question

Hi
In my active directory define user with "logonto computer" to user only logon to special user.for example i define 'bgs009' user with logonto property 'all computer' and 'bgs010' with logon to 'bgs005' that this user only logon to 'bgs005' computer.

In my asp.net program i try authenticate user against active directory.but for user 'bgs009' is successfull but user 'bgs010' always fail with this message "user name or bad password".i publish my website on 'server01' server.Now if i in active directory change logonto property 'bgs010' user to logon to 'bgs005,server01' user authentication is successfull.

Why?

please help me.

thank you