This video is a good place to start for tensioning a machine on a frame:
http://www.youtube.com/watch?v=Q1mRh...664A7&index=13
It says for longarms, but it seems to work for all frame quilting machines.
What size needle are you using? When FMQing on a frame, you tend to need a stronger needle than when FMQing sitting down. Usually a size 16 or 18 needle is recommended; these are strong enough not to bend under the faster movement of frame quilting.
How tight is your quilt? A common beginner mistake is to have the quilt too drum-tight. A quilt in the frame should be somewhat loose. The rule-of-thumb is that you should be able to grab a finger that is poked up from the bottom of the quilt.
You may be moving the machine too fast. 1600 stitches per minute is fast for a domestic machine, but not for a machine used on a frame. You will need to move the machine slower than a longarm.