lacie cloudbox

Just bought a 3TB unit, and after connecting properly, it appears LaCie-Cloudbox in the finder, but with a ? sign and a connexion fail message.

I can see it in the network properly and I can access it trough any web browser just typing his network address which gives me to the cloudbox dashboard.

But that's not the way it should work,as I can't use it as a HD for pictures, videos with Fotos and iMovie

Any suggestion? Thanks