Siren silences in LANAnnouncer

So I installed the LANannouncer and seemed to get it working but something keeps silencing the siren on my android phone. It works for a while and then it it is silent. It still notifies me and it still shows that the siren is going off and I have to dismiss it but there is no sound. Yes I have checked and made sure my volume on the android are all up. It will work with sound and then it wont.