Okay, I don't know what else to do!! I need some help.

What does it mean when you have threaded your serger and it still will not chain stitch?

Check to make sure one of the threads hasn't jumped ship.

Mine would not be threaded correctly. It is so easy to have one thread that is just not quite where it is supposed to be.

How frustrating this problem is. I haven't used my serger very much in the last 6 mo and it seems I am following the right steps in threading it. I was afraid there might be another problem, but I guess it may be as simple as I have threaded it wrong.
Do you mean that if it is threaded correctly then it will chain and if it is not threaded correctly it will not chain? :cry:

First check to see that your threads are properly threaded accordingly, before serging grab the back threads firmly and make a chain at least 2-4 inches long, stop, lift your presser foot, insert your fabric and serge away. When you finish your desired serging, chain off but keep it serging to leave a short tail behind the project, or else the serger will jam up or break your threads again. Don't forget to lubricate your blade accordingly. If you serge lots of items, the blade will require oiling.
Hope this helps!

Sergers need to be threaded in a specific order or they will not work properly. Look at your diagram and do them in order. it took me a while to figure this out. Try that and let us know if it works.

Make sure the threads are in the little tensioners.

Rule of thumb with most sergers is to thread top looper, bottom looper then needles---in that order. What happens is the loopers don't interlock the thread correctly if not threaded in the proper order....

Thanks and I will give it another try and let you know. I love the job these sergers do, even tho I don't use mine that often. It must be something in the threading and I am sure I will get it. Thanks everyone for your help!

Nine time out of ten it is the threading is incorrect. Try again, but rethread each one, don't try to fudge. I went around for hours making the same error because I did not start over. And Coyote Quilts is right, top first, bottom next, then the needles. In my case I kept screwing up my left needle over and over.