NPE - при заходе на сервер

[Dazay]

Заменил своё меню.
При нажатии на кнопку, должно заходить на сервер.

Нажимаю на кнопку, и вылазит ошибка NPE, игра при этом не крашится.

Вот код МЕНЮ

package ru.FuxKlin.NClientFixed.gui;

import java.awt.Desktop;
import java.net.URL;

import org.lwjgl.opengl.GL11;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import net.minecraft.client.gui.GuiButton;
import net.minecraft.client.gui.GuiLabel;
import net.minecraft.client.gui.GuiMainMenu;
import net.minecraft.client.gui.GuiOptions;
import net.minecraft.client.gui.GuiScreen;
import net.minecraft.client.gui.GuiSelectWorld;
import net.minecraft.client.multiplayer.GuiConnecting;
import net.minecraft.client.multiplayer.ServerData;
import net.minecraft.client.resources.I18n;
import net.minecraft.util.ResourceLocation;
import ru.FuxKlin.NClientFixed.NClientFixed;

public class NMainMenu extends GuiMainMenu
{
    int btnSelected = 0;
    public int MX = 0;
    public int MY = 0;
    int lastId = 0;
    public static String URL_SITE = "https://vk.com/";
    public String URL_DONATE = "https://vk.com/";
    protected boolean isClicked = false;
    public static final ResourceLocation textureback = new ResourceLocation(NClientFixed.MODID + ":textures/gui/nbackscreen.png");


    @Override
    public void initGui() {
            int i = this.width / 2 - 450;
            this.buttonList.clear();
            this.buttonList.add(new GuiButton(1001, i + this.height / 4 + 48, + 60 + 12, 145, 20, I18n.format("Вход на сервер", new Object[0])));
            this.buttonList.add(new GuiButton(1002, i + this.height / 4 + 48, + 94 + 12, 145, 20, I18n.format("Личный Кабинет", new Object[0])));
            this.buttonList.add(new GuiButton(1003, i + this.height / 4 + 48, + 128 + 12, 145, 20, I18n.format("Группа ВК", new Object[0])));
            this.buttonList.add(new GuiButton(1004, i + this.height / 4 + 48, + 162 + 12, 145, 20, I18n.format("Настройки", new Object[0])));
            this.buttonList.add(new GuiButton(1005, i + this.height / 4 + 48, + 196 + 12, 145, 20, I18n.format("Закрыть игру", new Object[0])));
    }
    
    @Override
    public void actionPerformed(GuiButton btn)
    {
        if (btn.id == 1001)
        {
        this.mc.displayGuiScreen(new GuiConnecting(this, this.mc, new ServerData("N Craft", "(IP палить не буду)", isClicked)));
        //this.mc.displayGuiScreen(new GuiSelectWorld(this));
        }
        
        switch(btn.id)
        {
        case 1002:
        try
        {
        Desktop.getDesktop().browse((new URL(URL_SITE)).toURI());
        }
        
        catch (Exception var5)
        {
        var5.printStackTrace();
        }
        break;
        
        
        case 1003:
        try
        {
        Desktop.getDesktop().browse((new URL(URL_DONATE)).toURI());
        }
        
        catch (Exception var6) {
        var6.printStackTrace();
        }
        break;
        
        }
        
        if (btn.id == 1004)
        {
            this.mc.displayGuiScreen(new GuiOptions(this, this.mc.gameSettings));
        }
        
        if (btn.id == 1005)
        {
            this.mc.shutdown();
        }
        }

    @Override
    public void drawScreen(int x, int y, float t) {
        this.MX = x;
        this.MY = y;
        super.mc.renderEngine.bindTexture(textureback);
        this.drawCompleteImage(0, 0, this.width, this.height);


        int k1;

        for (k1 = 0; k1 < this.buttonList.size(); ++k1)
            ((GuiButton)this.buttonList.get(k1)).drawButton(this.mc, x, y);

        }


    boolean isHover(int xx, int yy, int xx1, int yy1) {
        return isClicked;
    }

    public void drawCompleteImage(int posX, int posY, int width, int height) {
        GL11.glPushMatrix();
        GL11.glTranslatef((float)posX, (float)posY, 0.0F);
        GL11.glBegin(7);
        GL11.glTexCoord2f(0.0F, 0.0F);
        GL11.glVertex3f(0.0F, 0.0F, 0.0F);
        GL11.glTexCoord2f(0.0F, 1.0F);
        GL11.glVertex3f(0.0F, (float)height, 0.0F);
        GL11.glTexCoord2f(1.0F, 1.0F);
        GL11.glVertex3f((float)width, (float)height, 0.0F);
        GL11.glTexCoord2f(1.0F, 0.0F);
        GL11.glVertex3f((float)width, 0.0F, 0.0F);
        GL11.glEnd();
        GL11.glPopMatrix();
    }
}

В консоли если заходить в eclipse

Unexpected packet during modded negotiation - assuming vanilla or keepalives : net.minecraft.network.play.server.S00PacketKeepAlive

 

[tox1cozZ]

Коннектится на сервер нужно с помощью метода FMLClientHandler.instance().connectToServer.