there also appears to be some youtube videos
https://www.youtube.com/user/TinLizzie18/featured I don't know if they will help for future reference.
also there is a lot of getting to know your machine with any longarm. it's frustrating at times but keep trying. sometimes turning the eye of the needle slightly left like 6 to 6:30 on a clock helps. clean bobbin area, change size of needle, loosen or tighten sandwich.
you could also post on
www.mqresource.com which is a machine quilter's forum and see if they have suggestions.