inside of my SIL's fleece jacket. I undid the ribbing at the back - enough so I could get inside to attach pockets.When I went to sew the ribbing back between the fleece and lining(the lining had batting attached), the machine would bunch up the thread. The machine would stop - telling me to rethread the machine, that the thread broke. I finally had to leave it messy as he was headed out the nex morn for hunting and I would fix it when he got back.

I tried changing needles and then thread.
Any other suggestions?