Serum & Quick controls issue

Hi,
Is there a problem with Serum & quick controls in Cubase 14 Pro Widows 10.
Using Arturia Beatstep knobs 1 & 2 as midi controller to move modulator 1 & 2.
Works on screen with modulator moving on the vst Gui but, for some reason it wont record it.
Strangely enough if I use the same knobs but use midi learn on Serum it does work.
Any ideas anyone.
Regards
Mike