Using third party flightplanners

Hope you guys can help me with this one. I use FSbuild as my flight planner because it's compatible with both PMDG 737 as well as the PSS Airbus and it's a great product. My problem is FS9 only recognizes my flightplan as VFR even after selecting IFR when loading it. I only fly IFR so is there a way to set the default flight rules in the FS9 flight planner to IFR?Note:FSbuild is also compatible with FS9 and exporting flightplans is not a problem.