Dear Titus
Thanks for your comment. I replaced your file with former file that you sent me and then I built the new image file. After flashing the image file into the SD Card and booting the board, still the problem exists! (I received an error when I tried to enable eth0 as same as that shown in my previous post)
BTW, in my Ubuntu Linux that I used it to build image file, I don't have any cross compiler under arm-arago-linux-gnueabi-* name! As I mentioned you already, I followed the presented instruction within the below link:
https://developer.ridgerun.com/wiki/index.php/Getting_Started_Guide_for_DM368_DM365_LeopardBoard
It seems by following these instructions, all environmental variables and default value of cross-compiler will be set automatically. Hence I just run make config and then make and make install commands. By execution of these commands a new image file will be created under ../image folder.
Regards,
Dawood