Nothing happened when click start on ragnarok 2 launcher (windows 7)

When i click start on the launcher after finish update ragnarok 2, nothing happened, to solve this:
1. right click ragnarok 2 shortcut
2. click compatibility tab
3. check 'run this program in compatibility mode for:'
3. choose windows XP (Service Pack3)
4. check run this program as an administrator
5. click ok, now ragnarok 2 can be played
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