Casio CZ/ VZ/ FZ - Pro Series

Follow-up - Test # 3 (your exact steps may vary):

STEP 1: Connect CZ to PC
1. Connect midi in and midi out of CZ to sound card midi/game port using a midi-game port adapter.
STEP 2: Boot/Configure midi-ox (I have 7.0.2.372 - personal license)
2. Boot midi-ox.
3. Click on "Select MIDI devices to Open" icon.
4. Under MIDI Inputs and MIDI Outputs, select sound card MIDI port connected to CZ.
5. Click OK.
STEP 3: Find and load sysex file (CZ patch bank)
6. Navigate Windows explorer to folder where sysex bank is.
7. Double click.
[NOTE: If your OS is not set up to load syx files using midi-ox by default, you can (a) right click on the syx file, (b) select "Open with," and (c-1) choose midi-ox if listed as a choice or (c-2) navigate to midi-ox.]
STEP 4: Transmit syx file and receive CZ replies
8. In "Sysex View and Scratchpad" select Command Window menu item.
9. In dropdown box, select "Send/Receive Sysex."
10. Press "Done."

I have done this several time with the default midi-ox settings. Here is what is listed under configure (from top to bottom):
256, 16;
256, 16;
Auto-adjust Buffer Delays if necessary [ ]: 
Delay between Buffers 60 milliseconds
Delay after F7 [X]: 60 milliseconds
At the bottom, only Show F0-F7 in colored text is checked.

I am still at a loss for diagnostic questions that might be helpful in finding a solution, but here goes:
1. In the Sysex Receive after item 9, above do you show "112 Bytes Received?" If not, either the CZ did not receive the sysex or midi-ox did not receive the reply from the CZ.
[I know this is pretty much basic common sense, but since the transfer worked for me without fail each time, there's gotta be a solution for you.]
2. When you pressed "Done" after item 10 above, are there 16 sets of 
F0 44 00 00 70 30 F7 in the Display Window? (If not, what's there?)

In midi-ox you could also check the Output Monitor and the MIDI Port Activity window (SX all the way on the right (= sysex) should blink 16 times.

Hope some of this helps.

Steve