cannot set touchpad in KDE4

on my PC=Dell latitude E6510, RAM=8Gb, GPU=GT218 NVS 3100M, CPU=i7 Q 720 @ 1.60GHz
I’m running leap 42.1 with KDE4 and plasma5 using wolfi repos
in KDE4 system settings>input devices I cannot see and set touchpad so I cannot scroll
but in plasma5 system settings>input devices yes
how can I set my touchpad also in KDE4??
manythanks,:slight_smile: ciao :slight_smile: pier