747X not working after reinstall

I reinstalled FSX and the 747X. When I load it up the displays are blank and none of the switches work though a few of the knobs will rotate. The displays are already blank when they aircraft loads. They don't work for 30 seconds or so like others with registration problems have described. I also don't have a PMDG menu on the menu bar. I also tried installing the Level-D 767 and it has an error when it try to load it. I suspect there is a problem with FSX since neither addon works. Aircraft included with FSX work okay. I have reinstalled FSX and PMDG747X with no other addons and it doesn't work. I have checked the dll.xml file and I deleted fsx.cfg to get it back to the defaults. David