Casio CZ/ VZ/ FZ - Pro Series

Hello again, my music laptop has died on me, So for the moment, I've
resolved to getting a pure old school hardware setup working and
finally get my live italo band out on the road! I figured out how to
use an old friend's alesis mmt, synced it up to my korg drum machine
and then connected it my new (to me) casio cz-1000.

I got a few basic patterns going and it sounded really splendid (there
is such visceral pleasure in syncing hardware, isn't there?).. but now
I'm a little stuck.

My problem:

I put the CZ into `Solo' Mode, select Midi channel 1 on the left, and
then skip across to the right and select the other sounds by changing
the `vo' setting.....(note the `instruments' names below are just for
illustration)

Thus it looks Something like this

CH=01 VO=01 `bass'
CH=01 VO=02 `guitar'
CH=01 VO=03 `piano'
CH-01 VO=04 `choir'

So far so good, but when push on the VO channel to change the patch of
guitar, it seems to `follow' it and changes the `bass' sound to the
`guitar'.

When you pull it back down to the original channel (01), it goes back
to the bass. The effect is that it makes it really hard to get a good
understanding of what sounds go best with eachother!

The sequencer is an alesis mmt8 and I'm sending out on tracks 1,2,3,4.

Is this standard behaviour for a cz-1000? I don't expect it to run
like a pro sound module or anything but I was really hoping it could
run 4 seperate monophonic parts which could be changed/altered
independently of each other.

Can anyone help? I will reward you with my three of my favourite
italo/chip tunes!

Cheers :)

and thanks to everyone who advised me on the dump/sysex thing, am 
gonna try it when my laptop's back up and running