Lionel AF FasTrack remote control turnout doesn’t work using a separate AC power source

I plan to build a DCC-powered hi-rail layout using Lionel AF FasTrack components. Before purchasing the large number of expensive FasTrack remote control turnouts that will be needed, I bought just one 20-inch radius unit to confirm that they could indeed be actuated using a separate AC transformer [Chuck K outlined how to do this in his Feb.17, 2022 response to my Feb. 14 post- -see Using American Models powered turnouts with a DCC layout | O Gauge Railroading On Line Forum (ogaugerr.com)]. Accordingly, I followed the instructions provided in the Lionel owner’s manual [see Figs. 1 and 2] and used a Lionel #1033 90-watt transformer as my power source. The switch lantern and turnout controller lights go on, but the swivel rails remain stationary when the controller lever is moved back and forth. Note: Per the manual, the turnout is connected to the transformer’s common/ground binding post U and a variable-voltage post; I used post B and set the voltage at its 16-volt maximum [see Fig. 3]. Please advise me how to get the turnout to function properly.