Permission applet

i everybody, i have change the right of my applet, taht worked perfectly... but when i redo the same procedure, taht didnt work... but i retried and didnt work
but when i try on another package or class or directory taht work
does he have something to do when i want to remake for the same folder??
or did i have to redo this each time i modify my .class
sorry for my english


maybe is not that, because io try with another dir!!!!
can we add security juste one time????
because now i cant write with my applet, and still dont able to change the right!!!!!