Big Problem

I have one DEDICATE with: 2x Intel Xeon L5420, 16GB RAM, SSD: 2X 240GB, Traffic: 10TB, Up Link: 100Mb, UpPort: 1000Mb, Windows Server 2012

and when have 200 to 300 players online everyone is lagg.

I use L2JSunrise
Can someone help me?

I set up my gameserver.bat like this:

@echo off
title Game Server Console
color 0B
:start
echo Starting L2J Game Server.
echo.

java -server -Dfile.encoding=UTF-8 -Xmx8G -cp config/xml;./../libs/*;core.jar l2r.gameserver.GameServer

REM NOTE: If you have a powerful machine, you could modify/add some extra parameters for performance, like:
REM -Xms1536m
REM -Xmx3072m
REM -XX:+AggressiveOpts
REM Use this parameters carefully, some of them could cause abnormal behavior, deadlocks, etc.
REM More info here: http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html

if ERRORLEVEL 2 goto restart
if ERRORLEVEL 1 goto error
goto end

:restart
echo.
echo Admin Restarted Game Server.
echo.
goto start

:error
echo.
echo Game Server Terminated Abnormally!
echo.

:end
echo.
echo Game Server Terminated.
echo.
pause