another dimensions question: chatting in collective

Hey to all. I posted this in the dimensions app discussion but I'll post it here to move traffic off the app. for a bit. I'm having issues talking to others in collective. I double tap the button, speak my 5 second master piece, hear it back at me, but that's about it. I never hear anyone else and no one can hear me. What is going on. Am I doing something wrong? I will Definitely figure this out but thought I'd ask here. I asked on the dimensions rjdj page but with no luck. Everyone is wining about how they don't have twitter and face book. lol! Anyways. Take care and be blessed all, and thanks.