myeclipse安装都正常，运行时出错了 ，log如下，
!SESSION 2007-08-09 11:34:44.953 -----------------------------------------------
eclipse.buildId=M20060921-0945
java.version=1.4.1_03
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_CN
Framework arguments: -product com.genuitec.myeclipse.product.ide
Command-line arguments: -os win32 -ws win32 -arch x86 -product com.genuitec.myeclipse.product.ide

!ENTRY org.eclipse.osgi 4 0 2007-08-09 11:35:11.921
!MESSAGE An error occurred while automatically activating bundle org.eclipse.core.runtime.compatibility (25).
!STACK 0
org.osgi.framework.BundleException: Exception in org.eclipse.core.internal.plugins.CompatibilityActivator.start() of bundle org.eclipse.core.runtime.compatibility.
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:1010)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:966)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:317)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:256)
at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.preFindLocalClass(EclipseLazyStarter.java:86)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:409)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:188)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java:334)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:386)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:347)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:83)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass(BundleLoader.java:278)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:227)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1245)
at org.eclipse.core.internal.runtime.CompatibilityHelper.getPluginDescriptor(CompatibilityHelper.java:63)
at org.eclipse.core.runtime.Plugin.initializeDescriptor(Plugin.java:706)
at org.eclipse.core.runtime.Plugin.start(Plugin.java:692)
at org.eclipse.core.internal.runtime.PlatformActivator.start(PlatformActivator.java:39)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl$2.run(BundleContextImpl.java:991)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:985)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:966)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:317)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:329)
at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1037)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:573)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:495)

at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:275)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:455)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:189)
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:291)
Caused by: java.lang.NoClassDefFoundError: org/eclipse/core/runtime/Plugin
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:1627)
at java.lang.Class.privateGetPublicMethods(Class.java:1655)
at java.lang.Class.privateGetPublicMethods(Class.java:1665)
at java.lang.Class.getMethod0(Class.java:1744)
at java.lang.Class.getMethod(Class.java:963)
at org.eclipse.core.internal.runtime.CompatibilityHelper.setPlugin(CompatibilityHelper.java:48)
at org.eclipse.core.internal.plugins.CompatibilityActivator.start(CompatibilityActivator.java:23)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl$2.run(BundleContextImpl.java:991)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:985)
... 31 more

[解决办法]
--------------------------------
!SESSION 2007-08-09 11:34:44.953 eclipse.buildId=M20060921-0945
java.version=1.4.1_03
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_CN
Framework arguments: -product com.genuitec.myeclipse.product.ide
Command-line arguments: -os win32 -ws win32 -arch x86 -product com.genuitec.myeclipse.product.ide

---------------------------------


java.version=1.4.1_03 java版本1.4.1？ 版本太低了 你没有设置java_home么

[解决办法]
版本不兼容的问题，建议使用JDK1.5