Hi, This might not be the correct place, but after I sent e-mails to the support team and never got an answer, I hope that this issue might be escalated. First I want to say that the airplane is a very nice one, I had the option to fly it two times before my issue just came up. Second, I did the registration on my laptop, well I just had to see the plane, but I fly on my Desktop so I went over the registration processes again and there where no issues. The activation window pops up every time the plane is loaded and I enter the same e-mail and password as expected. I just have no idea why I started to receive this message, which make the plane none function after ~5min or so. Though I have highly respect to the X-Aviation team and their intentions, this DRM processes is flowed and need to be revised. I know that I'm not the only person who had this issue, but this is un-acceptable in any standard. Support mails need to be answered in timely manner and this DRM authentication that happens every time I load the plane is just ridicules, it should have been done in the background. There is no reason to pay for a super aircraft, if all I can do is look at the failed authentication window without understanding what went wrong, and without real support people. I strongly encourage other simmers to really think twice before they buy DRM staff, because you will probably find yourself testing your patient over and over just to let the "tech" team resolve the issue, until then please fly the default X-Plane planes or the none DRM aircraft. Last, to X-Aviation, the aircraft on your site are undoubtedly one of the best I have seen or flew, but your DRM just su**s. Keep the good work, and I sure will continue every now and then to gaze at the lovely C400 panel without being able to use it, even though I payed for it :-\