Check your database version when first time login fails.

[RChin]

If login fails and you installed Scenario Navigator without the default MS SQL 2005 Express database server, then please check your database version.

Scenario Navigator 2.1 only works with the English version of MS SQL. It will connect to e.g. a Dutch MS SQL version, but you will get an error message when trying to log in. This is caused by a difference in date-time formats between MS SQL server versions.