Minecraft ne veut pas se lancer !

bonjour, j'ai un probleme avec minecraft il veut pas se lancer j'ai le launcher ascentia je suis crack, quand je le lance sa me dis sa




Java model: 64 bits ! =D
Recommended RAM allocation: 1536M
RAM allocation: 1536M

C:\Program Files\Java\jre7\bin\javaw.exe -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1536M -Djava.library.path=C:\Users\willy\AppData\Roaming\.ascentia\natives -classpath C:\Users\willy\AppData\Roaming\.ascentia\libraries\vecmath-1.3.1.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\trove4j-3.0.3.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\icu4j-core-mojang-51.2.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\jopt-simple-4.5.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\codecjorbis-20101023.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\codecwav-20101023.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\libraryjavasound-20101123.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\librarylwjglopenal-20100824.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\soundsystem-20120107.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\netty-all-4.0.10.Final.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\guava-15.0.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\commons-lang3-3.1.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\commons-io-2.4.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\jinput-2.0.5.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\jutils-1.0.0.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\gson-2.2.4.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\authlib-1.3.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\log4j-api-2.0-beta9.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\log4j-core-2.0-beta9.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\lwjgl-2.9.0.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\lwjgl_util-2.9.0.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\lwjgl-platform-2.9.0-natives-windows.jar;C:\Users\willy\AppData\Roaming\.ascentia\libraries\jinput-platform-2.0.5-natives-windows.jar;C:\Users\willy\AppData\Roaming\.ascentia\bin\minecraft.jar net.minecraft.client.main.Main
[16:07:16] [main/INFO]: Setting user: MaxiMus972
[16:07:16] [main/INFO]: (Session ID is token::-)
Completely ignored arguments: [--launcher, 4.0]
[OptiFine] (Reflector) Method not pesent: dy.func_149713_g
[16:07:22] [Client thread/INFO]: LWJGL Version: 2.9.0
[16:07:23] [Client thread/ERROR]: Couldn't set pixel format
org.lwjgl.LWJGLException: Pixel format not accelerated
at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelFormat(Native Method) ~[lwjgl-2.9.0.jar:?]
at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat(WindowsPeerInfo.java:52) ~[lwjgl-2.9.0.jar:?]
at org.lwjgl.opengl.WindowsDisplay.createWindow(WindowsDisplay.java:244) ~[lwjgl-2.9.0.jar:?]
at org.lwjgl.opengl.Display.createWindow(Display.java:306) ~[lwjgl-2.9.0.jar:?]
at org.lwjgl.opengl.Display.create(Display.java:848) ~[lwjgl-2.9.0.jar:?]
at org.lwjgl.opengl.Display.create(Display.java:757) ~[lwjgl-2.9.0.jar:?]
at lO.gU(Unknown Source) [minecraft.jar:?]
at lO.bv(Unknown Source) [minecraft.jar:?]
at net.minecraft.client.main.Main.main(Unknown Source) [minecraft.jar:?]
Exception in thread "Client thread" java.lang.NullPointerException
at Ay.a(Unknown Source)
at mk.f(Unknown Source)
at mk.aB(Unknown Source)
at lO.bv(Unknown Source)
at net.minecraft.client.main.Main.main(Unknown Source)