[otrs] New answer into AgentTicketZoom

Hello all!! I want to add a new answer to the right panel of AgentTicketZoom (OTRS2.4.7+ITSM1.3). Currently, I have email-answer and phone-answer. I want to add my custom-answer. In order to try a test first, I'd use AgentTicketCompose.pm as a template and I created AgentTicketComposeCustom.pm. I did modify AgentTicketZoom.pm and AgentTicketZoom.dtl After this changes, I restarted apache server, but this new answer, never appers on the right block of AgentTicketZoom......do I need to modify/include anythin more? My new module is registered correctly, because I can call it directly from the browser.... Thx in advance!