Did you get a DVD with your machine? I did with the 8900. See if it shows a close up of the needle being threaded.
I agree, when I prepare to thread the needle I use the needle down needle up first. And I let go of the threader mechanism slowly so I can see the little loop coming through.
And I did have to take my 9000 in to have the little wire replaced one time...
Let us know how it goes.