Crashing on start-up

[CaptainMidget]

Hey, so recently i wanted to play again and now i get this error and am slightly confused as to why.

java.lang.NoClassDefFoundError: com/sun/gluegen/runtime/DynamicLookupHelper
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at com.sun.jnlp.JNLPClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at com.sun.jnlp.JNLPClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at javax.media.opengl.GLDrawableFactory.getFactory(GLDrawableFactory.java:106)
at javax.media.opengl.GLCanvas.chooseGraphicsConfiguration(GLCanvas.java:520)
at javax.media.opengl.GLCanvas.<init>(GLCanvas.java:131)
at javax.media.opengl.GLCanvas.<init>(GLCanvas.java:90)
at haven.HavenPanel.<init>(HavenPanel.java:63)
at haven.MainFrame.<init>(MainFrame.java:120)
at haven.MainFrame.main2(MainFrame.java:211)
at haven.MainFrame.access$100(MainFrame.java:34)
at haven.MainFrame$5.run(MainFrame.java:266)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.sun.gluegen.runtime.DynamicLookupHelper

Sorry, im not sure how to make it smaller. There is more to the error but either my screen is not large enough to see it all and copy it and theres no scroll down option. This happens when ever i try to launch it from the website. Any idea's? (I want to play with through the Ender client but i thought i should download it via the website first)

EDIT: if this helps i am a 64bit Windows 7 laptop.
EDIT: Fixed, just download an update for java or redownload java and make sure it installs into program files not (x64) one.

[Samko80301]

EDIT: Fixed, just download an update for java or redownload java and make sure it installs into program files not (x64) one.

i've got it in program files but it doesn't work
any idea?