L2J Server

I have a problem .. I installed a server with l2jserver c4-R25 and its corresponding DataPack .. Lodges, but when I try I get an error LoginServer ... and the following appears:

java.lang.illegalargumentexeption: bad arguments
at javax.crypto.cipher.dofinal<dashoA13*..>
at net.sf.l2j.loginserver.clientpackets.resquestauthl ogin.<init><resquestA
uthlogin.java:58>
at net.sf.l2j.loginserver.clientthread.run<clientthre ad.java:183>

Help me on that please .... I have already installed the latest version of java

it seems to be an encryption error, but without the COMPLETE error message it's harder to help.
Also, please dont use these damn colors, they make it harder to read your post