Umberto,
Not sure where to go from here and may require you to remote into my computer. So I have close to all of your products and all of FB. I installed CYVR into a fresh v4, then installed KCLT. I load up P3D v4 and both worked fine and in the addon manager had them as registered and active. Ok, perfect. So I then install KFLL, Hawaii 1 and 2, KDFW, KJFK v2, PHNL, LSGG, GSX, KMEM, KIAH, then the FB stuff, KSFOHD, KPHX, KIAD, and KDEN. I now go into P3D v4 and any of the airports i select gives me no ground polys, and only the gates. I try to activate using the key but when I input the key it does nothing. for KCLT, there are elevation problems and pretty much everything is missing. Obviously I have something screwed up but after scouring for the past day of what could be wrong, countless reinstalls, I am at a loss of what could be wrong. The only other products I have installed so far are ORBX FTX Global, FTX Trees, a couple of VirtualCol aircraft, FSTramp, FTX NA OLC, FT CYYZ, FT CYUL, Ultimate Traffic Live, all of the simaddons stuff and Washington X and UUEE by Drzewiecki Design.
Any idea of what I need to be looking for next?
Sean