Serviio

I had everything working fine...then it just disappeared. I have 2 computers running serviio and 2 stereos...1 upstairs and 1 down stairs DVD blue ray playyers. Both played wireless fine from either comp. I have verizon fios too. Now neither DVD player sees either computer but you can get on pandora so I know it's getting to through the network. I can't see the serviio on either machine?? One machine is XP one is 7..both did work fine. I think maybe verzon did an upgrade but don't really know?? Stumped
Howard