Hi Norbert, it should work, I use both these plugins together on multisite myself.
Meteor Slides supports the Members plugin, it has custom capabilities that are used if the Members plugin is activated, so you can control which roles can manage the slides.
By default when you activate Members and Meteor Slides together, those custom capabilities are used, and none of the standard roles have those caps, so the slides menu doesn't show up. But the super admin should always have access,
You can add the custom caps to your admin role and the slides menu should show up. Check out this tutorial on Using Members with Meteor Slides for more info.