Problem with servo output

Hello, hope i am in the correct section. I have a problem with no servo(signal) output.To me it looks related to version as it outputs normally on 3.12 with thesame settings. I connect ch3 an ch1 to sabretooth. The mission planner shows nothing on servo output page when on 3.2 When on 3.12 it shows green bars on all channels, and outputing correct. Maybe interesting thing: in servo output page on 3.12 - min, max and trim values are greyed out at 800, while in 3.2 values are different and editable. Thanks for any help,

Edited:Installed latest 3.21 and all seems to be ok aggain., thanks for upgrade.