I just started having this problem, but only on the ADV model.  The B and C models are fine.  

Was that a permanent solution or simply an in-flight reset?  doesn't sound like it was permanent.

Whenever I see all the fix suggestions I am amazed.  I've bought the products.  707-Base installs and works like a charm.  The expansion packs, however, have the reported "no landing gear" issue.  So now I have aircraft that don't install properly and I am supposed to rip out software, mess areound with my registry, uninstall, reboot, reinstall, blah, blah, blah.  Why am I supposed to?  i paid for a product that was advertised to work. It was advertised to install and work properly.  I had to provide an order number to prove that I bought it.  Why am I supposed to fix it.  Captain Sim makes no such mention of the invisible landing gear issue.  They just took my money and gave me a faulty product.  I will uninstall it and I will avoid Captain Sim purchases.

If I went to any other retailer and bought a product I'd sure insist that it work without me having to open the case and fool around with the innards.  Why am i supposed to here?  

I appreciate that people offer suggestions and solutions.  To me there is only one solution and that is for Captain Sim to deliver what I paid to receive in working order.  

I am not going to compromise my computer to fix a problem of their creation.  I don't know why anyone would.

Thanks Mark, all works great! Bob

Captain Sim wrote on Mar 5^th, 2011 at 3:36pm:

This was posted in a Topic, also about missing landing gear, a few days ago. We have two separate Topics about the same issue.

Mark

Did you do the registry clean (KB #685) before reinstalling?

How to clean Registry:
1. Uninstall the product
2. Go to Start> Run. Type: regedit, click OK.
3. Find the product entry in HKEY_LOCAL_MACHINE\SOFTWARE\CaptainSim\ (please note, for Windows 64bit versions it is HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\CaptainSim\)
For example: HKEY_LOCAL_MACHINE\SOFTWARE\CaptainSim\C130XPRO
Make sure you are going to delete correct folder!
4. Delete the product entry folder.
5. Restart your computer.
6. Install the product.

If that still doesn't fix the problem. Use the Extended Download Service, download a new file and install that to see if it fixes it.

Mark

I understand how you feel. However. If you delete the wrong one, you will just need to reactivate the installer before reinstalling the one you accidentally deleted.

Maybe you will find it easier to try if you can see what to look for inside the registry.

Mark

Having a similar problem. Somethings quite not right. Some times when I load the 707 I have no landing gear and other times I may load the very same aircraft and same flight and the gear is there and this isn't specific to one particular model it seems either. On top of that when this occurs I cannot click on/use any of the switches in the cockpit. I can hear them move etc but no animation or effect will follow.I tried loading the default Cessna and start off cold and dark and again the problem will occur to be honest I'm stumped.