The SQL 2005 express server is installed on a windows 2K SP 4 previously. Other services relied on SQL works perfectly. I tried to installed EPO 4.0 on this server. On the "set database information" dialogue during the installation, the local server is not found on the drop-down list of "database server". I manually inputed the the local server name and other information, the following error message comed up constantly: "the logged on user must have "act as part of operatiing system" rights to use NT authitication to connect to the database. Log on using an account with these rights or SQL authentication."
I dont think we have problem with user permission problem as i inputed administrator.