Hello Tamers!
We really apologize for any inconvenience you've experienced.

For solving dc issue(Version info), you can patch 
update files on DOWNLOAD menu of Gameking website.
(http://dmo.gameking.com/download/GameDownload.aspx)

Please download and install the Update Patch File(big button) & Patch 234 - 255(small button).
Even you've did it but if still does not work, 
then we recommend downloading the Client file(Full version).

# Note .If the DC, Launcher error always occurs after Maintenance, 
please check and download new patches.

Thank you!