The user manual is online here http://www.tristararms.com/ckfinder/...s%20manual.pdf
On page 10:
"Ensure muzzle is pointed in a safe direction before placing finger on trigger.
After firing, the empty cartridge will be automatically ejected through the ejection port. Be sure all observers are clear of the path of ejection, as the empty cartridges are thrown out with considerable force and could cause injury."
OK, re-read your report and it sounds like it is not cycling. Since it ejected fine when you cycled the bolt by hand, this has nothing to do with the ejector at all. This is totally a gas system question. Maybe they forgot to drill the gas port in the barrel ? Look at the exploded diagram on page 19 and verify that you are not missing any O rings or any of the parts. There should be powder residue on the gas piston, if not maybe they did mess up the gas port or its location.