Yawcam

Every now and then, I use Yawcam and because of the "simplicity" of it, I am a happy user. However, this happened a few months ago and now again, after a couple of days, having no problem at all, now the modem (Experia Box v8) reboots itself. Only when the cam is on. The previous time I had the same thing going on.
Any suggestion what the problem can be?