Internal and External SD card paths on Optimus 2X
This is a small bug in cyanogenmod. You can mount /emmc to /sdcard/external_sd by folowing command:

 su
 mount -o bind /mnt/emmc /sdcard/external_sd


You need to install a terminal emulator (e.g. Android Terminal Emulator) in your mobile for excuting command. It's 100% working.