I've just emerged from the swamp ride of updating my iPAQ RX3115 firmware. I think HP didn't tell me something...
After 6 attempts on 2 machines (more than!) I updates Activesync, but it never worked until I unplugged a SD Memory Card in the device.
I'm dropping this note so others might avoid this fate.
This one tip will help you sleep better tonight
A few seconds are all you need to get a better night's rest.