When i run a form (ctrl+r), even if i'm already signed in, i got the error ora-01017 - invalid username/password, then i press OK, and it's displayed the window with the current user, password field blank, and the instance. But why i got ora-01017 error? i checked for any triggers before the form starts, but .. nothing. the user running the form isn't the user specified when connected? (when i was asked Do you want to log on before performing the compilation...?) i think that should be that user.
Thank you. I was becoming crazy...
There is a problem between Forms 10g and oracle database 11g, when you login through the IDE and try to launch your forms by it, it sends your connect parameters in uppercase, and you get an error.
I changed the oracle database configuration, so in this way the database doesn't case sensitive and I fixed the problem.