Q: My airport express and wireless airplay speaker are connected to wife, but airplay and homesharing are not working...what to do?

My airport express and wireless airplay speaker are connected to WIFI, but airplay and homesharing are not working...what to do?  Everything was working fine until about two weeks ago, all of the sudden airplay has disappeared from the iphone, itunes on the laptop, and the apple remote for iphone.  I have restarted the router many times, re-setup the airplay speaker and the airport express and booth are showing as being properly connected to the router when I log into the router IP address.  I was on the phone with Apple support for 30 minutes they blames verizon, got on the phone with verizon and they stated the settings were all correct and compatible with apple, got back on the phone with apple and they again are blaming verizon and trying to get me to get an airport extreme because that would fix the problem...any suggestions, please!