arduIMU not in sync error while using FTDI cable

Hi, I tried to get binary serial from arduIMU V3 board. I programmed using a FTDI cable and breakout board from sparkfun. Earlier it was uploading the sketches to it but after i used this code for binary output it stopped working. Now i am unable to upload any other code with that FTDI board. I think there is problem with Tx and Rx line because the red led on breakout board is constantly glowing and it may block the serial channel. Please help me solve this. getting the following error message avrdude: stk500_getsync(): not in sync: resp=0x00

I am using ubuntu 12.04 and arduino 1.0.5. My board selection and USB port are perfectly fine.