We bought an Erle-Rover a month ago and encountered a problem particularly with direction.
In fact, when we ask it to turn left with the RC command, there is no problem. But when we ask it to turn right, it does not want to stay in this state.
Also, sometimes the Erle-rover does not answer to the RC command even if it charged, and even after minutes of waiting. Each time, it happen when the blue LED is turned on.
We noticed that it works only when the blue LED is off, and both of orange and green LED are turned on with the same strength.
In the picture in the link below, this is the configuration when the rover does not want to be controlled.
Hope you can help,