Casio CZ/ VZ/ FZ - Pro Series

Hello everybody:

Excuse me for my first-level question, but I'd like to know how to
receive/send sysex dumps between my CZ-5000 and my computer, by using Midiox
program.

I would like to make backups of my sounds (all 32 sounds in one sysex file
would be ok, I don't need to send/receive one single sound). I only want
this storage function, not editing the sound from the computer.

I have done usually the same operation with Midiox and other synths I've
got, but I don't know how to make the CZ to start dumping or start
receiving.

Thank you for your help and goodbye from Barcelona (Spain)

Alfons