So I was unable to download AutoCAD for mac from the education community page. I get a serial number but I hit download now and nothing happens. I did finally get it to work from the free trial 30 day place. Now my serial number from the education community comes up as being the wrong format even though it is not. Also on the education community page the product key says "none" but the register screen does not like that either. Why won't the software come off of the education community site and why won't the software I did get not accept my registration credentials? Please help.