Garmin 520 refusing to accept new signature

Hi, I’ve been trying to update my signature on my 520 but using Garmin express and copying an fasting the signature into each of the IQ apps appears to work in Garmin express but when synced my MPA stills hows as 1200 rather than my true MPA. I remember that you can dot his via your phone and Garmin Connect but have forgotten how. any suggestions?

I had the same problem and used a different computer after trying with no luck on the first computer; had success right away

I’ve tried doing this via my phone and the Garmin Connect app, but MPA remains at 1200