I changed (only!) the password of a cvs account and set this new password in a project definition in continuum by the web interface. The next build of the project did not work, because of a wrong password (no access to cvs was reported). It seems, that continuum uses the old password although a new password was set. After changing the cvsroot (replaced ip number by dns entry; 100% NOT the reason for this error) the cvs system could be accessed; the new password was used.