Hello ! i'm new on this forum, but a old player of Freespace 2 ! thanks for the SCP and this forum

(sorry for my poor English, french people inside)
For my first post, i explain you my problem :
I played with FS2 with a Sidewinder FF pro 1 for many years, very funny especially for the Forces !
recently i bouth a Sidewinder FF pro 2 for its usb connection and Vista compatibility (?? i'm not sure ??), i use Win XP SP2 mini driver for the Sidewinder FF pro 2, its detected as a force feedback wheel 2. No problem with games like Flight simulator or Crimson Skies, button work perfectly and forces too.
But into Freespace 2, the button are working good, but the force are worst than my old FF pro 1 ! no forces when a ship explode or into the Flak ! the only forces i have are for the afterburner and fire control !
Does anyone got the same problem than me ? or is it normal ?
Ps: I'm in charge for the FR traduction of Freespace 2 with the Help of Metal Destroyer.