help in domain network envirment

dear friends
i have a problem with connection to the sql server and clients


i am working in windows domain envirment.
a server that is domain controler having name is PROJECTS runing microsoft windows server 2003. when i go to install SQL Server 2000 in it windows return me an error of SQL Server SP2. one of client machine i make for SQL Server .. and other for the client of that ..
the problem is , when i install client tool for SQL Server on other client matchines and connect to the sql server machine system return me an error of connection faild... on of my network machine is connected with the login of Administrator of domain server but when i want to connect this machine by a domain user name the error will return. an other machine is connected by domain user name and not connected with administrator of domain login ... i am in problem of this error


please help me soon