I have Ver. 1.200/2.100.
Which Patch should I do next?
It would be this file...
dwonrx20000051200005.exe (Client: Ver 1.200 -> 2.000 - Heavenly Strike Update)
Then proceed downward.
It seems, that you have the latest launcher patched, but you don't have latest client patched yet.
Sincerely, Pan2011 (December 21st, 2011)