Glide Navigator II Problem

My GNII, running on an iPAQ 3955, won't load files.

I have the program file under the "Start" menu.
I have the turnpoint file, in *.txt format, under "My Documents."
I have the airspace file, in *.sua format, under "My Documents."

The same files are on the storage card.

I've been using this setup for many years, but all of a sudden, it doesn't work.

GNII starts on the pda, goes to the screen which allows selecting to use GPS input or run as a simulator, but when it gets to the screen of "Initializing GNII" and "Loading files", it hangs, as if it can't find the files.

Greatly appreciate any help.

Thanks,
Ray Lovinggood
LS1-d
W8