[Freeswitch-users] stop channel from entering conference

Hello all, I have a scenario where: A calls B (i.e.: +19995551212) and puts it on hold. A calls C (i.e.: +99911111) and when it answers: The client sends a refer to B to connect to a conference, and then transfers C to the conference. All this works well, but i need to block specific called numbers from entering the conference. I can identify the channels as they come in and i'm trying to hangup the leg i want. I tried with <action application="hangup"/> and also with <action application="set" data="res=${uuid_kill(${uuid})}"/> but all channels are disconnected. Not sure if i'm doing something wrong. Any help would be appreciated Regards, David Villasmil email: david.villasmil.work@gmail.com phone: +34669448337