Get this client http://supportmii.com/ro1/Clients/2012-04-10aRagexeRE.exe Use Shins Diff Patcher , Select WeeDiff plugin from the drop down box and select the client you downloaded above.
Select the Recommended patches (Deselect Read Data Folder First, Read Lua Before Lub Unless you want them) and make sure you select SKIP PACKET HEADER OBFUSCATION. Remaining patches you can add as per your liking. Once everything is selected select patch it. and use the patched exe
If you are still having issues let me know I will diff one and upload it