For all you Embroidery Folks out there, I need help, I was embroidering a deer and when the needle goes over what already sewn, the thread goes wacky and I get error telling me to check my upper thread it keeps doing the same thing over and over, can someone tell me what I need to do to fix this, I've changed thread, needle, and bobbins, I've adjusted the tension don't know what else to do, and the person that will be working on my machine is at the fair, so he not avaible until after the fair and that's two weeks...can someone please help or give me some ideals on what to check...