The problem that I have and this only happens with the Boeing 707
which I purchased just a couple of weeks ago, is that when I make a flight plan in fsx for example ft. lauderdale to Tampa IFR not VOR
and now I am starting at the airport of ft lauderdale, bu t now the flight plan changes to vor plus a different location  like Seattle to so and so,  I also start the sim with a Cessna first.  So why is this happening ?? Flight plans getting changed from  ifr to vor and only happens with the B707.