I am very proud of myself up to this point. I have created a login system using a PHP service class - method which functions properly when a user enters in their correct username and password. After a correct submission the form populates their account page with all their info! FB4.5 did ALL the work for me via the generate form wizard.
My simple question is how do I implement an Alert telling the user they have entered an invalid username /or password, in place of the detailed flash player error message I am receiving now.