Navdata problem

I have a problem with the downloaded navdata. It seems that it differs from the standard FS2004 flight-planner navdata. When I set up a flight from Heatrow to Schirpol with flightplanner and program it to the FMC this happenes (image)http://www.stud.ntnu.no/~kjorlaug/temp2/nav.jpgYou can see that the plane is 20-30 miles from the airport and the route is not so smooth as in the flightplanner. When i fly the route the route ends before I reach Schirpool. I have tried with both the lastest and older navdata. I put the navdata in FS2004FMCWPnavdata -folder.Torbjoern