First of all sorry for the delay in response.
About Gateway buttons, use only reset button for Xbee reset, the others are for general I/O and now they are not relevant.
Moreover, The X-CTU tool of Digi is very useful to read Xbee networking parameters parameters and also to change them. We recommend you using it to see if all Xbees are in the same network, channel, etc. X-CTU software can be downloaded from Digi website http://www.digi.com/products/wireless-w ... odule#docs
Besides that, if you check our development section, you will find a specific networking guide for your modules and other useful documentation which explain the necessary networking concepts to use with sensor networks.http://www.libelium.com/development/waspmote
Take a look into this information and pleas ask all the necessary questions.