Replying to Skis make a rattling sound

I just got some new sticks mounted and I after I took them for a test drive I noticed they make this rattling sound when I shake them. Its like theres something inside the ski thats moving around. More precisely it's coming from under the toe piece of my marker griffons. What the hell can it be? Did they somehow manage to fuck up the mount? I don't really feel like going back to the shop since it's a car ride away but I don't want to keep them if they are duds either.