关于eclipse3.2.1的安装有关问题

关于eclipse3.2.1的安装问题
我装了JDK7，然后安装eclipse 3.2.1,报错" An error has occurred.See the log file"
LOG file 如下：
 !SESSION 2008-04-27 05:41:41.359 -----------------------------------------------
eclipse.buildId=M20060921-0945
java.version=1.7.0-ea
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=zh_CN
Command-line arguments: -os win32 -ws win32 -arch x86

!ENTRY system.bundle 4 0 2008-04-27 05:41:41.718
!MESSAGE FrameworkEvent.ERROR
!STACK 0
org.osgi.framework.BundleException: Exception in org.eclipse.osgi.framework.internal.core.SystemBundleActivator.start() of bundle system.bundle.
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.StartLevelManager.resumeBundles(StartLevelManager.java:549)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:484)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:275)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.launch(StartLevelManager.java:245)
at org.eclipse.osgi.framework.internal.core.SystemBundle.resume(SystemBundle.java:155)
at org.eclipse.osgi.framework.internal.core.Framework.launch(Framework.java:503)
at org.eclipse.osgi.framework.internal.core.OSGi.launch(OSGi.java:51)
at org.eclipse.core.runtime.adaptor.EclipseStarter.startup(EclipseStarter.java:289)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:173)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336)
at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
at org.eclipse.core.launcher.Main.run(Main.java:977)
at org.eclipse.core.launcher.Main.main(Main.java:952)
Caused by: java.lang.IllegalStateException
at org.eclipse.osgi.internal.baseadaptor.BaseStorage.checkSystemState(BaseStorage.java:654)
at org.eclipse.osgi.internal.baseadaptor.BaseStorage.getStateManager(BaseStorage.java:634)
at org.eclipse.osgi.baseadaptor.BaseAdaptor.getPlatformAdmin(BaseAdaptor.java:385)
at org.eclipse.core.runtime.internal.adaptor.EclipseAdaptorHook.frameworkStart(EclipseAdaptorHook.java:80)
at org.eclipse.osgi.baseadaptor.BaseAdaptor.frameworkStart(BaseAdaptor.java:260)
at org.eclipse.osgi.framework.internal.core.SystemBundleActivator.start(SystemBundleActivator.java:55)
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)
... 18 more
Root exception:
java.lang.IllegalStateException
at org.eclipse.osgi.internal.baseadaptor.BaseStorage.checkSystemState(BaseStorage.java:654)
at org.eclipse.osgi.internal.baseadaptor.BaseStorage.getStateManager(BaseStorage.java:634)
at org.eclipse.osgi.baseadaptor.BaseAdaptor.getPlatformAdmin(BaseAdaptor.java:385)
at org.eclipse.core.runtime.internal.adaptor.EclipseAdaptorHook.frameworkStart(EclipseAdaptorHook.java:80)
at org.eclipse.osgi.baseadaptor.BaseAdaptor.frameworkStart(BaseAdaptor.java:260)
at org.eclipse.osgi.framework.internal.core.SystemBundleActivator.start(SystemBundleActivator.java:55)
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)