Duh..... In my haste to get things working I neglected to reboot the PC after reinstalling the cable driver. Seems to be working fine now on the V8000. And I was using the wrong cable. I have two cables: one with a 1/8" mini that plugs into the speaker jack and one with an RJ45 that plugs into the mic jack. I could've sworn I used the RJ45 on the V8000 last time. Its working now with the 1/8" mini in the spkr jack.
Now I'm about to try the one with the RJ45 in the F121 out in the mobile. Cross your fingers. And thanks for not laughing.

Sometimes I'm surprised I can tie my own shoes.......