MinImu-9 (Acc, Compass and gyro) and Arduino LilyPad

Hello, I used the code-example of the Pololu MinImu-9 to connect it to the Arduino LilyPad. I changed Serial.print() of the values roll, pitch and yaw in Serial.write() in order to send these values to an Android application.

The problem is that, after a few seconds of success, the sending crash (saturate?) 4-5 seconds and later continue, but now the app receive erroneous values. Also, while the sending crash, the green light on the LilyPad board turn off.

Can bluetooth+I2C saturate LilyPad?

What's the meaning of the green light in the LilyPad board?

I will be very grateful of any help! Thanks!!!