Seems like you had activated the license before in temp site and want to activate it in live site. May be the license you got is personal license and only allows single activation. So you first need to remove the license from the temp site and use it in live site.
Or you can login to http://www.masonrylayout.com/your-account/ and reset or manage site from there. Also, i think you had send me your key in email and i have already reset it.
If still there is any issue please do let us know.