TypeError: Error

How do I fix this?  The site no longer exists.

Flash creates a separate txt file as well.

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

  at Seekers_Finders_Trailer_fla::MainTimeline/randomInterval()

  at Function/http://adobe.com/AS3/2006/builtin::apply()

  at SetIntervalTimer/onTimer()

  at flash.utils::Timer/_timerDispatch()

  at flash.utils::Timer/tick()