Can't execute JavaScript before a page has been loaded

gistfile1.java

org.openqa.selenium.WebDriverException: Can't execute JavaScript before a page has been loaded!
Build info: version: '2.25.0', revision: '17482', time: '2012-07-18 22:18:01'
System info: os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.6.0_27'
Driver info: driver.version: HtmlUnitDriver
	at org.openqa.selenium.htmlunit.HtmlUnitDriver.getPageToInjectScriptInto(HtmlUnitDriver.java:505)
	at org.openqa.selenium.htmlunit.HtmlUnitDriver.executeScript(HtmlUnitDriver.java:450)
	at net.thucydides.core.webdriver.javascript.JavascriptExecutorFacade.executeScript(JavascriptExecutorFacade.java:27)
	at net.thucydides.core.pages.jquery.JQueryEnabledPage.isJQueryEnabled(JQueryEnabledPage.java:41)
	at net.thucydides.core.pages.PageObject.addJQuerySupport(PageObject.java:686)
	at net.thucydides.core.pages.PageObject.openPageAtUrl(PageObject.java:588)
	at net.thucydides.core.pages.PageObject.open(PageObject.java:546)
	at net.thucydides.core.pages.integration.CheckingVisibilityWithTheFluentElementAPI.openStaticPage(CheckingVisibilityWithTheFluentElementAPI.java:31)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
	at org.junit.runners.Suite.runChild(Suite.java:128)
	at org.junit.runners.Suite.runChild(Suite.java:24)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

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