VFD drive problems with older 3-phase motors (correction)

(correction to my previous post)
I've heard that there may be problems using VFD drives with older
motors, and I am indeed having problems with mine. But I'd like to get
input from others on their experiences.

The motor I'm trying to run is a big 3HP 240v 3-phase, 2-speed mounted
on a Logan Lathe. It was run by the guy who sold it to me using a
rotary converer, which I haven't tried yet, but will to see if I can
get it going that way.

For testing, I bypassed all the controls, contactors, etc. and hooked
the VFD directly to the motor. The motor has 6 wires which I've tested
with an ohm-meter and concluded that it's wired in a delta format with
1-2-3 being one set of connections and 4-5-6 being another. At least,
that's what I'm guessing based on the measured resistances.

Originally, I tried the VFD outputs to the 1-2-3 motor inputs, and
could get the motor to respond slighly in both directions, but with
absolutely no power. Enough to rotate about 1/2 rev.

Connecting to the 4-5-6 inputs results in no movement and just a
little whine from the motor.

Is there something obvious I could be overlooking? I scoped the
outputs and I am getting high voltage, periodic (i.e. pwm pseudo-sine)
outputs (with the motor connected).

Thanks for your input.
-ted

p.s. merry xmas!