L2J Server

L2J Revision c4_2164:
L2JDP Revision initial import:

Hi am trying to get my client to connect to my server but i am getting this error under my gameserver :session key is not correct,closing connect..i have tried to change the protocol under the config and that never helped i cant find a protocol 660 client anywhere and i would like to know how can i fix this error plz?

topic moved to legacy server support, as it appears to me as c4 ?

Yes it is C4 check the revision dont know how to fix it and have been trying all week