Gauge and other Errors

I've tried installing the F-16 and F-15 updates for FSX. Models show fine in the sim but dont show in the sircraft preview, actaully no add-ons show in aircraft preview. Next, when i load the f-16 it comes up with a bunch of gauge errors saying that they're made for '98 or earlier and mont work, so they wont load. Another gauge error is that in VC in any addon aircraft no guages are displayed but they show fine in the 2d cockpit (If they use the same gauges that is). Are these just problems with running a 9 plane in X or is there a fix??