Karenowc

I have that same set up and bought it 4 years ago. I've only had one problem with breaking thread and I solved it by switching to another cone of thread (same mfg.). It was a bad spool.

Here is what I use:

King Tut in the top
Bobbin Line or Aurifil in the bobbin
Inspira 90/14 top stitch needles (purchased through the Jo-Ann's store)

Keep the bars about 1/2"-1" above the bed of the machine. I can usually go a few rows before adjusting it up again.

Do you have that bar threaded on the front of the machine (the one with the 3 holes)? I'm not at the same place the machine is, I think I go down the first hole (the one furthest away from the machine). Bring it up and around the bar and down hole #3.

I clean the bobbin area each time I put in a new one.
Are you threading with the foot up?
I oil after each project.

Edited: If you join the yahoo group they have so many answers and they post photos of the machine set up. also, I don't have my machine at it's highest speed. Back it off at least a 1/4. You don't want to quilt fast, you want to be consistent.
yes, I have the controller and it works great.