Flight plans lost?

Have had a great flying month, with nearly 40 hours flying the Baron from
Wisconsin to Portland, OR, and then on separate trips east to New York, and
then Vermont.

The plane has run great- not needing a quart of oil in either engine for
over 40 hours! Encountered ice, thunderstorms, and mountain flying- what a
great experience.

However, my flight plans seem to be getting lost in the system. I've filed
them from Voyager (a great program, but slow), as well as Jeppesen
Flightstar.

The software says that the flightplan has been accepted, but when calling
up, there's nothing to be found. It happens around 50% of the time (ever try
to air file with New York Center?)

Anyone else seen similar behavior? Is it a problem with Voyager, or is the
FAA system screwed up worse than usual?