[ovirt-users] Iso Upload

Dear All, I thougt it was possible to upload an iso to ovirt 4 now. But for some reason I didn't manage to do it. If I try to upload a iso in the disk section ov the gui, I'm always getting the following message: Make sure ovirt-imageio-proxy service is installed and configured, and ovirt-engine's certificate is registred as a vailid ca in the browser. ovirt-image-io-proxy is installed. Already rerun engine-setup... But still the image get's paused when I try to upload it... Any ideas?