Arduino Wont Send Serial Data

Arduino will not send data to my bluetooth mate, rx/tx are inverted and cts and rts are not connected to anything, the bt mate will connect to my linux laptop however if i put rx to the usb tx when it is sending/recieving data to or from pc it will send that data to my computer via bluetooth, but if i connect to bluetooth modem to the arduino normally, it wont send or recieve any data, is there any way i can force the arduino to send serial data

Did you connect the grounds of the Arduino and the blutooth modem ?