To transfer books wirelessly, 1- your Calibre server must be ON, 2- you enter your local IP address into the touch browser's address line in this format:
http://192.168.1.118:8080 where 8080 is the port used by Calibre and the 192.168.1.118 is replaced with you own IP address ( usually only the last 3 numbers will differ from the example above.)
Link below explaining how to find your IP address
http://www.bobborst.com/tools/whatsmyip/