Hi. BEX error after pressed Game Start (DNkr)

[1stsim144]

This started last Sunday night. Yes Night.
I played DN in the afternoon till 6pm..
After that when I try to launch the game around 9pm.. It gave me this error instead.

I tried System Restore as many suggested in Google, didn't work.
The DEP method, didn't work.
Clean uninstall/reinstall, didn't work.

I'm resorted to this..
Actually, is there any native korean will be kind enough to help me post this problem in HappyOz DN forum?

[1stsim144]

I found a fix!!

Go C:\Documents and Settings\%userprofile%\App Data\Roaming\Identities [copy paste this] delete the folder in 'Identities' and delete also the dragon nest folder in your My Documents folder. Restart.