After Object Copy operation, retention doesnt change

Hi Experts!.

Im using Data Protector 9.05 and trying to properly configure Object Copy Policies.

The objective is quite simple: copy from Disk to Tape some long retention images and, of course, after the Object Copy, reduce the retention of the original image (in disk) in order to free that space soon, but here is the issue: the retention doesnt change:

 I set these parameters in the Scheduled Object Copy definition:

 I have tested too with the "Recycle data.." option checked, but same behaviour...

Any idea?.

Thank you!!