This is a new PC. When it was set up two days ago it was fine, we could log onto the domain with the new users credentials, administrator credentials or local user (not into the domain).
Today the only way to log in is as the administrator when logging into the domain or as a local user.
We've tried several domain accounts that work fine on other XP machines in the office. The particular user can log into the domain from othe PCs as well.
The only domain login that works at this machine is administrator.
The server is 2003 with AD.