Crash minecraft 1.7.4

Bonjour, je crash a chaque fois que je lance le jeu et ca me dit ceci:

Exception in thread "main" java.lang.UnsatisfiedLinkError: C:\Users\ivan\AppData\Roaming\.minecraft\versions\1.7.4\1.7.4-natives-101940218908348\lwjgl.dll: Can't load IA 32-bit .dll on a AMD 64-bit platform
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary1(Unknown Source)
at java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at org.lwjgl.Sys$1.run(Sys.java:73)
at java.security.AccessController.doPrivileged(Native Method)
at org.lwjgl.Sys.doLoadLibrary(Sys.java:66)
at org.lwjgl.Sys.loadLibrary(Sys.java:95)
at org.lwjgl.Sys.<clinit>(Sys.java:112)
at azi.K(SourceFile:2153)
at net.minecraft.client.main.Main.main(SourceFile:76)

a quoi c'est du svp