B & M Shifter issue

[Orence1]

I have a B&M Starshifter in my 72 with a TH-350. Worked great for a number of years but last year the ratchet function started acting up. I can pull it down into the ractheting position. When I kick it forward from 1st to 2nd it will go but I have to hit it more than once. It will not ratchet from 2nd to 3rd. I works fine when just pulling it into drive or reverse. Will also allow me to change gears manually in normal mode. Anybody had to deal with this? Do I need a new cable or is it an adjustment issue? Any help appreciated.