Help on packets

I use wpe pro to make the God Mode in RO. I get the packet address but when i on the filter, my game disconnected after receiving attack. Anyone here can help me solving the problem. Thank You

They have CRC checks with packets to check if its been tampered with. Most likely unless you can modify the client or packets so that the CRC is correct you wont be able to fix it.

Is it possible to make god mode by using other tools such as cheat engine..etc. I heard that it cannot be, because its server side.

There is always ways of doing stuff, its just the method of finding it.