Tab missing on Tasks creation

Hi masters! I', having a bizarre case:

When creating tasks via "new" button on the Tasks search option, the tab "anexos" (frame GS_CM Main WIndow), does appear.

But, when creating a task via Tasks -> new the same tab does not appear.

The configuration is exactly the same in both cases.

The view is BT125H_TASK -TASKOVVIEWSET- usage CUBT125HTASK. The frame GS_CM is configurated to be showed.

Thank you for yuor help!