Hello, This is STOVE.

STOVE has detected error when user access to the Client with new account which is made from 09 SEP.
We have just found the cause and update our client to fix this issue.

[Process]

1. Log-in with new account
2. [PC Game] > Select Crossfire Zero
4. Install the Crossfire Zero and
6. After Installation, unable to play Crossfire Zero when  'Server checking...' message is shown

Sorry for your inconvenience for playing Cross fire Zero.

Thank you