Andy:

No wheels showing was a problem I had when I added the cargo and AWACs expansion packs to my original installation without first updating the base installation to version 1.3 - it was very frustrating until I figured out the fix

If you installed the original 707 release base models when they first came out some time ago and then recently added the expansion packs you might need to first upgrade your original install to 1.3 then install your cargo and other expansions.

You can find the 1.3 service pack under "Updates" on the 707 product page - if you just recently bought the whole package than 1.3 is probably already incorporated and this may not be the answer but it's worth a try

That solved the no wheels prob for me

Hope this helps - good luck!

Bill