Xbee communication problems

I have 2 XBee Series 2 modules, 2 Xbee shields, a XBee explorer. I've programed both XBee modules using XCTU in a mesh network (one being a router, one coordinator). When i have both Xbees attached to my PC, they receive and send text. One of my arduinos has a program that checks if a pushbutton got pressed and sends a serial text saying: "on", and on the other arduino a programs check for serial strings, and if it gets one it turn on a led. I can't get my arduinos to communicate using Xbees. Could anyone help? :slightly_frowning_face: