Navigatekey,Next in Frame inside a form

[LogSistemas01]

Folks,

I have this frame that is inside this popup form, the enter does not work to go to the next field, not even the tab.

 

 

The Form is configured 

  Position = poDefault
  KeyPreview = True
  NavigateKeys.Enabled = True
  NavigateKeys.Prior.Key = 13
  NavigateKeys.Prior.ShiftState = [ussShift]
  NavigateKeys.Next.Key = 13
  NavigateKeys.Next.HandleBrowser = True
  MonitoredKeys.Keys = <>
  Movable = False
 

The frame is placed at run time.

 

What intrigues me most is that injecting the frame in this way, directly into the main form, works correctly

 

Does anyone know what can it be ?