Changed domain from old winnt to new win2k server on
winxp pro. After that couldn't access server shares got

Logon unsuccessful: The user name you typed is the same
you logged in with. That user name has already been
tried. A domain controller cannot be found to verify that
user name.

Tried "silly" method that I read somewhere else to change
to workgroup then reboot and then back to domain. It
worked but only for some time. Now I can't logon on
domain with other user names that aren't logged on my
computer(get no domain available erroe) only by myself
and i am back where started. Where could be the problem?