Loop function doesnt work?

Hi guys

I have an MPC 100 with JJOS2XL and i have problems again. I cant play im loop mode for some reason. Even the "loop" button in the upper lef corner doesnt let me do it.. Whats up with this? Can i change it?

Thank you!

Can you be more specific on the problem? Step by step, i.e.

1) load sample
2) go to TRIM
3) etc etc.