receive error 951 when running ilogin

I recently get error 951: "Incorrect password or user informix is not known on the database server" when trying to connect to the database install on my laptop using ilogin or informix sql, it was working but I do not recall installing any new software (except windows update) Informix server 9.40 is installed on a Windows XP laptop. Informix connect 2.90 TC5 is installed. Setnet32 is configured server and host information. I can use dbaccess without any problem using different user. but when I try to connet using ilogin, informix sql or odbc connection i get the error 951 even using the informix user. I even try to reinstall informix server and connect and I still get the same error... Any ideas? Your help would be greatly appreciated!