beam grouping

I just import an xml file from sibelius and the part of tambourine is beamed as in the print screen. I try shift+M and put [1+1+1+1]/4 but doesn’t work.
If somebody can give me the solution ?

Best regards

The notes may have been imported with invisible (un)beaming code from the original. You could try the command ‘Reset Beaming’, it will remove the beaming overrides. It’s in the Edit menu, submenu Beaming, and in the contextual pop-up menu (right mouse button).

great thanks: I can print the part for tomorow morning
Best regards