well, u get the invalid client when u choose your caractere, choose the server and when you click on connect, the black screen before the loading appear and in the midle u see, in white, invalide client. If you see that:
1st: delete all your 2moons folder ( c

rograme files/acclaim/2moons + select all the folder and click delete)
2nd:uninstall 2moons
3rd: reinstall (when you are reinstalling the game, if you have AVG antivirus, you will get an error of succubus.dll, just ignore it)
4th: do the game update but dont click on start
5th: restart your computer
6th: download on this web site dekaron
no_crc 4.5.2 ,
gameguard killer v.1.2 (rev:1222) and
gameguard killer launcher v.1.2a
7th: go to c

rograme files/acclaim/2moons/bin and extract gameguard killer first. then dekaron no_crc 4.5.2, then guameguard killer launcher.
8th:you will see rocket in ur folder, click on it. a window will appear. click on (...) and select dekaron no_crc 4.5.2 .
9th: click on launch
10th: if u dont see any image of gameguard its because the bypass work.
11th: log in and the message should not appear
12th: if u want to hack, dont know what you will do so u want to hack with the datapak.d04, you have to take this 1 ( the new version of 2moons)
click thanks if i helpped u