Hi, after recently re-installing fs9 and the PMDG 747-400...the Queen now appears to load OK..then after about 60 seconds, all the mfd's go blank. Any ideas on the problem would be welcome.Russell.

Sounds like an authenication problem. It sould work on a simple reinstall, in fact I reformated my hard drive and I could reinstall, so you may have to email pmdg support to get your authorization problem resolved.

Yes Dan, thanks for your advice. I think you're right. I never thought of that at first, as it accepted my validation and installed as it's done before. Anyway...email sent to support. Cheers.Russell.