LED on GPIO lines not working on BeagleBoard-xM Rev-A3

We are facing problem while glowing LED on GPIO line with below details

  • Setup Details :
    Beagle Board-Xm Rev-A3
    Ubuntu 11.04
    Kernel Version 3.1.4-x6

We Executed the below command
$ cd /sys/class/gpio
$ ls
export gpiochip128 gpiochip192 gpiochip64 unexport

We have attached the LED to pin no: 24 & 28.
According to schematic pin no:24 is connected to gpio168.
With the above output we are unable to glow LED.
Are we missing any driver or setting?
Please find the attachment of Kernel log.

kernellog.txt (20.6 KB)