ID-12 RFID Reader with Arduino Uno

Hello, I am currently working on a school project that requires me to be able to read data off of a passive tag. I am using the ID-12 Reader along with the Arduino Uno. The problem that I continue to encounter is that I don't get anything to read on the serial monitor whenever I pass a tag over the reader. I have the reader wired correctly and have tried multiple codes in an attempt to get this to work, however I experience the same issues. Any advice on what I should try differently is greatly appreciated. Thanks

Posting of schematic and program code will make helping you much easier.

I have been using several different codes, as well as the schematics associated with them. I have tried the following examples: http://playground.arduino.cc/Code/ID12 http://www.instructables.com/id/Reading-RFID-Tags-with-an-Arduino/ http://tronixstuff.com/2013/02/26/arduino-tutorial-15a-rfid-with-innovations-id-20/ http://wiki.dxarts.washington.edu/groups/general/wiki/edb5e/ I have also used several more examples and none have worked for me. So any advice on what else I can try would be great. Thanks.