Not possible to associate components in 3D

Hello,

I’m testing Solidworks (Electrical) 2017 right now. But I experience a strange problem.

When I try to ‘associate’ a part, it is not possible to push the green checkmark after selecting the part.

When I select the part I want to associate, you see it in the ‘Associate component’ box, but after that nothing happens.

Can someone tell me what the problem is? Is it a known issue?

Thanks.

SolidworksElectrical