There is a free update for Poser 11 Pro from the new owner, and they sent notifications and emails and info. The reason your old software does not work because SmithMIcro shut down their server since they no longer own Poser. Please go to https://www.posersoftware.com/downloads, have your serial number ready and download the new version. it is free for you. Make sure, again, that you have the serial number. Download the exe and the PoserSupport file first, then any content files. Sorry to emphasize this--make sure you have your serial number. And choose to exist your preferences and your install location when you install to get the least trouble.