Hopping into DCS...Remote not varying variable channel voltage

Hey all,

After about 6 months of unsuccessfully searching for someone to help me re-program and load new sound files into my factory sample Frankenstein PS2 and PS3 Locos, I finally bought an older (New old stock from an auction) DCS system and jumped in head first.  Everything was new in factory sealed box, but clearly older stock from a while ago.

Here's what I've been able to do:

• Confirmed TIU is Rev H1
• Downloaded the Installer program v5.0 and DCS v 6.1
• Upgraded the software in both the TIU and the remote to 6.1 using the loader.  Confirmed through DCS remote during boot-up and via TIU system check.
• Powered the TIU through AUX port using Z750 transformer form an old RK engine.
• Used my old ZW to power the Variable Input 1.  Set the ZW handle to 20 volts.
• Ran variable 1 output to a single piece of track (I intend to use as a programming track, not part of any layout so it's all by itself)

When select Track V1 (I renamed it to JWP) it bring up the speed screen.  But when I spin the thumbwheel, the voltage output always reads "0.0" (Z)

If I go into the System menu on the remote and set track JWP to "FXD", the track pops to life with full voltage.   So the channel isn't blown.

@gunrunnerjohn suggested in another thread that the track can start as "FXD" and when I want to run conventional, I can just select that track in the remote and start spinning the thumbwheel.  So I tried that, but the remote still reads "0.0 (Z)" even though there is confirmed 20V to the track (I measured from center rail using voltmeter).

If I stay in this mode, I can run the conventional engines by varying the voltage using the LW handle, but the remote always reads "0.0 (Z)"

So I tried switching to Variable Channel 2 and the behavior is exactly the same.

Any thoughts on why the thumbwheel won't scroll voltage up or down after selecting the track?

Thanks

Jeff