hello i want to write data to an read/write but the code that i have doesn't seems to work .How i can find out if the cards are read/write or read only.The RFID module that i'm using is an Libelium SM125 and the codes are from here http://www.cooking-hacks.com/index.php/documentation/tutorials/arduino-rfid .And i need some codes to try,maybe i get lucky with one.Please help me !!!!