ya your F900bt is way out of date. Do you want to stick with the F series firmware or do you want to run with the x series firmware?
Also check your bluetooth version as well. I bet you will need to update that as well if you use it.
go here to download the f series firmware updates and also the bluetooth update if you need it as well. (if you want to stick with the firmware for the f series)
http://www.pioneerelectronics.com/PUSA/Car/GPS-Navigation/AVIC-F900BT?tab=firmware