Selenium IEServerDriver 找不到 IE9 的新窗口

The problem is that WebDriver doesn't seem to find the new window when running in IE9. Here's the code I am using to try and switch to the new window:

public boolean switchTo(final WebRobot robot, final String pageTitle) {
    boolean found = false;

    int count = 0;
    while (!found && count < 20) {
        final Set<String> handles = robot.getDriver().getWindowHandles();
        final Iterator<String> itr = handles.iterator();
        while (itr.hasNext()) {
            try {
                final String current = itr.next();
                robot.getDriver().switchTo().window(current);
                if (robot.getDriver().getTitle().contains(pageTitle)) {
                    robot.getLogger().debug("Switching to " + pageTitle);
                    found = true;
                }
            } catch (final NoSuchWindowException e) {
                count++;
                try {
                    Thread.sleep(2000);
                    System.out.println("Handles: " + robot.getDriver().getWindowHandles().size());
                } catch (final InterruptedException ignored) {
                    //Nothing to do here
                }
            }
        }
    }
    return found;
}

(WebRobot 是我编写的一个类，它允许我使用 WebDriver 轻松切换浏览器和执行模式.robot.getDriver() 返回 Selenium WebDriver 对象.)