LANSA for the Web Errors: "User information provided is not valid"
The most common cause of this error is a problem with the Default User set up.
Check that the Default User (DFTUSR) has been properly specified using the LANSA for the Web Administrator
Check that the user profile being used with Default User exists.
Check that the password provided for the Default User is correct.
Test that the user profile and password are correct by using them to sign on to the Server.