I cannot open my minecaft (minesafter)(windows 7) it says:

[18:59:36] [Client thread/INFO]: Setting user: Player
[18:59:36] [Client thread/INFO]: (Session ID is token:6d4c48c473674416a6a639515a3227a4:00000000-0000-0000-0000-000000000000)
[18:59:39] [Client thread/INFO]: LWJGL Version: 2.9.1
[18:59:40] [Client thread/INFO]: Reloading ResourceManager: Default
[18:59:40] [Sound Library Loader/INFO]: Starting up SoundSystem...
[18:59:40] [Client thread/WARN]: File minecraft:sounds/mob/ghast/fireball.ogg does not exist, cannot add it to event minecraft:item.fireCharge.use
[18:59:40] [Thread-6/INFO]: Initializing LWJGL OpenAL
[18:59:40] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[18:59:41] [Thread-6/INFO]: OpenAL initialized.
[18:59:41] [Sound Library Loader/INFO]: Sound engine started
[18:59:44] [Client thread/INFO]: Created: 512x512 textures-atlas
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1. A fatal error has been detected by the Java Runtime Environment:
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2. EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x2a873e88, pid=7772, tid=7060
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3. JRE version: Java(TM) SE Runtime Environment (7.0_67-b01) (build 1.7.0_67-b01)
4. Java VM: Java HotSpot(TM) Client VM (24.65-b04 mixed mode windows-x86 )
5. Problematic frame:
6. C [ig4dev32.dll+0x3e88]
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7. Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
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8. An error report file with more information is saved as:
9. C:\Users\Eddie\AppData\Roaming\.minecraft\hs_err_pid7772.log
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10. If you would like to submit a bug report, please visit:
11. http://bugreport.sun.com/bugreport/crash.jsp
12. The crash happened outside the Java Virtual Machine in native code.
13. See problematic frame for where to report the bug.
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    AL lib: (EE) alc_cleanup: 1 device not closed