hi, I get problems during migrate my 2000 server domain to a new 2003 server domain, when I try to build trust between these 2 domain, it always say: "domain cannot be contacted" , actually I can browse each ohter domain, and can access their shared document from either side. my 2 domain's setting like this: 2000 server's prefered DNS server is 2003 server's DNS server, and alter DNSserver is itself. 2003 server's prefered DNS server is itself, and alter DNSserver is 2000 sever's DNSserve. 2000 server domain is in mix level ,and 2003 server is in windows 2000native(that's ADMT tool required?). acutally before I raise 2003 sever to window2000 native mode ,I still can create trust ,but it can not be verify. show the erro message: " the trust password verification failed with error 1787: the security database on the server does not have a computer accout for this workstation trust relationship." after I raise the level to 2000 native ,then I even can't create trust? do I need to buidle a new 2003 domain since it can't be reversed? and even I rebuilde the 2003 domain, how do I resolve the computer account problem? thanks in advance!