Enabled auditing on custom table but the shadow does not show any data if a record is updated on cus

we have enabled auditing on a custom table and shadow tables were successfully created, however when a record is updated on the custom form we do not see any records in the shadow 'xx_A' table. if we run a update statement manually on a record in our custom table we can see a record in the shadow 'xx_A' table. so the triggers are working fine when a manual update statement is done but when done through the form looks like the trigger is not fired.

can anyone please let us know if we have to enable something on our custom form to fire the triggers when a record is changed?