i need help for this problem?

your computer could not be joined to the domain because the following error has occured,access denied,
this error is happening when i create users for active directory users and computers in windows server 2003,i have 11 computers ,,1 server and 10 clients,,i created 10 users in active directory users and computers ,,until here i have no problem,,but when i want join client computers with server it is happening this error(your computer could not be joined to the domain because the following error has occurred,access denied)
i can join 3 client computer with the server in fourth computer it happening that error,,please what can i do?

First, make sure you are doing this as a domain administrator. Second, make sure the computers that are having problems can "see" the domain controller. Simple test is to be able to ping the domain controller from the affected clients. Also make sure the affected PC's are not running any of the Home edition operating systems. Those cannot be joined to a domain. Check SMB signing as well:

http://forums.techarena.in/active-directory/30990.htm

Did you create the computer accounts in active directory prior to joining them? If you did, just delete the computer accounts and then try joining them again.

yes i created accounts in active directory then i just could joined 3 computers to server after that i couldn't ,,that link that you have put here didn't help me

Go ahead and delete the accounts you created. Once they are deleted, try joining the PCs to the domain. You do not need to create computer accounts prior to joining them to the domain.

ok i will try thanks