Thank you,
I lowered the mass of the sphere quite a bit...
And I tried playing around with thickness, ridgity, stretch resistance of the cloth, but still penetrates... Should I just go for rigid/softbodies?

Kinda weird; you can drop cloth on passive colliders, no problem. But dropping stuff on your cloth object causes problems.. I MUST be overlooking something..

If anyone got other suggestions.. Please

thnx