So, we are doing Into the Woods at my high school and I'm running the wireless microphones. we are using a mix Sennheiser ew 300 receiver an packs and Sennheiser ew 100 g3 receivers and packs. I am running ten packs( both kinds) from a Mackie sound mixer into a Mix wizard which in turn runs to a eurodesk which goes out to our speakers. It appears that only the receivers from the Mackie are cutting out and one pack (which just so happened to belong to main actor) is creating a lot of static and a little feedback. Is there any way I mix this out or anything I could try with the pack. I've already checked the squelch and the frequencies and signals are all okay. I can't change the orientation of the boards or packs. Please this is my first real musical and I don't really know what I'm doing...