it should work if you just put.
player action ["EJECT", name of jet]
Infact I just used it earlier today and it worked fine.
but, if the jet is an addon and has a fancy ejection script, then it may cause problems.
what kind of jet is it. who made it.
you may need to go in the addon by depboing it and look at the ejection script, then you can just call it using a trigger,
[jet1] exec"INQ_A10/scripts/ejectionseat.sqs"
somthing like that,
good luck