Division : Other functions?
Black screen does not work.
A_1. Did you upgrade graphic card driver to its latest version?
Black screen uses graphic card's high function through Microsoft DirectX. Therefore, black screen could not properly work without its latest version of driver. We'd like you to update DirectX to its latest version (It works at DirectX 7.0 or higher version).
  A_2. Are you using old graphic card?
Black screen sometimes donot work with old graphic cards. Please contact us with information on your graphic card.