Publish Settings

If I use the publish settings as flash player 9.0,
will it be affected in the real stiuation?
Becuase when I set as fp 9.0 it allows me to use some fuction,

but I change to fp 10.0 or above, it has bugs.

TypeError: Error #1009: Cannot access a property or method of a null object reference.

          at flashmo_196_square_fla::MainTimeline/frame71()

          at flash.display::Sprite/constructChildren()

          at flash.display::Sprite()

          at flash.display::MovieClip()

          at flashmo_196_square_fla::page6_16()

          at flash.display::Sprite/constructChildren()

          at flash.display::Sprite()

          at flash.display::MovieClip()

          at flashmo_196_square_fla::allpages_14()

          at flash.display::MovieClip/prevFrame()

          at flashmo_196_square_fla::MainTimeline/btn_enter()