its nothing to do with the files you flashed - its simply the right trigger is stuck. it may be easy to fix or it may not be. if the button is stuck down it is easy to release it (press and release a few times applying a little force left or right at the same time as pressing) however if the button is not actually stuck the ribbon or the connector inside the psp could be damaged or loose. worst case is the psp may not be repairable.