How to fix this AS2 error (class already in use)

Does anyone has a clue on how to fix the AS2 class error that says the name of the class is in use?

Error Z:\Carinhoso\FLA\ Line 4: The name of this class, ‘picMotions’, conflicts with the name of another class that was loaded, ‘picMotions’.

Total ActionScript Errors: 1 Reported Errors: 1

Also, I have a code like this…

var aaa:picMotion = new picMotion(img, "foto2", 5);

When I update the class with and error on porpouse it doesnt tell me anything… it keeps using the “old class build” that works and does not update it…

Flash MX2004 was all good, im having !¨%@¨%# nightmares with this problema in Flash 8, anyone else here?