AdcCraft123

how do i do that

when i place a car on my modded server it crashes and has this really long report:

When i try to join my modded server it crashes and says this: java.lang.IndexOutOfBoundsException at java.nio.Buffer.checkIndex(Buffer.java:512) at java.nio.DirectIntBufferU.get(DirectIntBufferU.java:248) at net.minecraft.client.renderer.RenderGlobal.func_72712_a(RenderGlobal.java:350) at net.minecraft.client.renderer.RenderGlobal.func_72732_a(RenderGlobal.java:294) at net.minecraft.client.Minecraft.func_71353_a(Minecraft.java:2205) at net.minecraft.client.Minecraft.func_71403_a(Minecraft.java:2135) at net.minecraft.client.network.NetHandlerPlayClient.func_147282_a(NetHandlerPlayClient.java:239) at net.minecraft.network.play.server.S01PacketJoinGame.func_148833_a(SourceFile:70) at net.minecraft.network.play.server.S01PacketJoinGame.func_148833_a(SourceFile:13) at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212) at net.minecraft.client.multiplayer.GuiConnecting.func_73876_c(SourceFile:78) at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1650) at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:962) at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:887) at net.minecraft.client.main.Main.main(SourceFile:148) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) at net.minecraft.launchwrapper.Launch.main(Launch.java:28)