Some ODBC applications display a logon dialog box when you are connecting to a data source. In these cases, the data source name has already been specified.
In the logon dialog box, do the following:
You must have cataloged any database you want to access from the client.
If you leave your user name and password blank, the ODBC application assumes you have already logged on using SQLLOGN2 (under DOS) or using User Profile Management. If you have not, the application returns an error. You must either type your user name and password in the dialog box or log on using SQLLOGN2 and STARTDRQ (under DOS) or using User Profile Management.