Hello, I am in scientific america for a changing world (shuster) under Amy Gray. My courses will not complete under my reading assignments. This is usually an automatic thing, I read the assignments and/or answer questions and the chapters show 0%complete. As of a few days ago I have not been able to complete assignments even though i read and answer the questions. Also i had the trial version and switched to the actual version a few days ago. Please help, and let me know if there is anything i can do from my end. My email is JamesFauth@gmail.com. I have tried multiple (public and private) computers, laptops, Ipads... with no luck.