Casio CZ/ VZ/ FZ - Pro Series

Has anoyone ever cobbled together an AC adapter for a Casio CZ-101?  I
tried tonight and failed.  I took a plug from one adapter, and made
sure it fit the keyboard.  Then I took the wall-wart portion of a
different adapter that I thought would run the keyboard.  I spliced
the good plug onto the good power supply, making sure to get the
polarity correct.  And nothing happened.

I was using a 9V 210mA power supply.  I tried the whole process again
with a 9V 200mA power supply (in case the first power supply was just
dead).  That also didn't work.

My original Casio AD-5U Adapter is 9v 850mA.  I didn't think it would
make much of a difference, but I guess the wall-warts I tried just
didn't have enough current?  Anybody tried this?  If so, what rating
on the wall wart?

I'm pretty sure I got the plug correct and polarity correct.  I also
tried wiggling the plug, and there was no lighting up whatsoever.  So
I think it can only be the wall-wart portion that is bad.