XBEE S2C PROBLEM IN LINE PASSING AND CHAT

I WANT TO LINE PASSING USING XBEE S2C BUT I AM GETTING PROBLEM IN IT, SO I TRY SIMPLE CHAT USING MY MODULE ,SO CHAT IS ALSO NOT WORKING , PLS HELP ME FIND SOLUTION WHAT MISTAKE I AM DOING IN IT.

What firmware versions are you working with?

Take a look at this page: http://www.digi.com/blog/videos/xbee-tech-tip-digital-io-line-passing-with-xbee/

Again, what firmware versions are you working with on the XBee modules? Are the settings at defaults?

Let me state it this way. The default firmware for an S2C module is Zigbee which does not support DIO line passing. So what function set and firmware version are you working with on your S2C Modules?