I have been using Lightroom.Adobe.com to share collections with my family and friends. They have been able to freely access and download images because of the access that I have provided. However, I distributed a collection to my family recently and I'm getting reports that they are being asked to sign in. This hasn't happened previously. In fact, my wife was able to access the images through the link in the e-mail the first time she tried. But the next time she tried it asked her to log in. Am I doing something wrong?