RN42-I/RM Bluetooth not detectable

Hello All,

This is my very first query to the forum. I am trying to connect my arduino with my android phone via bluetooth. Since yesterday the bluetooth suddenly stopped working. The red light of the stat is blinking but my android or PC can't detect the bluetooth. I have no idea why it happened. Earlier, I did transfer data to and from my android phone to the Serial Monitor .Everything was working great. Please help me.