howto access windows 2003server and use

I reset my password on windows 2003 server and now I can not login locally. But I can login with domain admin password from a client computer. This is very strange.

I then thought I would install or access the user management mmc console from the client computers. computer. But I do not know howto. I assume I have to install something on the client computer. IN NT server I could install the srv and user utility. This I do not find on win2003.

Please help, urgent!