Loading TPU on SM2

G’day. I’m very new to this. Two weeks ago I was using Flexible TPU without a problem.
I had previously printed and installed the adapter and all worked well.
Today I attempted to load TPU and it just won’t feed correctly. I press the load filament button and it extrudes from the nozzle. If I press again, or try to print normally nothing comes out nozzle. if I unload filament it doesn’t look damaged. Just a little kink in it. any ideas appreciated