hi everyone, i recently purchased the pmdg 747-400 for fsx.But when i start flying, after 1 minute, my altimeter goes to -7000ft and i can't change it to normal with the B button.i don't know why that happens ? please helpgreets bjorn

There is a very simple solution for this, just a few forms down is the PMDG forum, just post your question there. But don't forget to sign your real name to your post so they can verify you are a legit customer :( :( :( Good luck