cozy

I bought 20S/2 All Purpose Sewing Thread Spun Polyester Overlock Cone 1500 Yards Sewing Thread , to be able to use more economical, larger cones if thread for my projects than the small spools, in my Singer 301a sewing machine. I mostly sew fleece fabrics, and some flannel and canvas. Fleece mostly and that's what its messing up with currently.

My machine has been sewing great with regular gutermann 100% polyester 500m & 1000m spoolsbof thread.
But immediately when trying to use the cone of thread I bought it tangles, knots and jams in my machine! I've tried putting cone behind, above & and tonside, above & straight behind machine, nothing is changing it. It tangles a mess below the plate. I'm using regular gutermann thread in bobbin. This polyester overclock cone seems thicker.
How can I get it to work reliably, smoothly in my singer 301a sewing machine?