我有以下XPath：

//div[contains(@id, 'box')]/div/h4/small/a[contains(@href, 'google')]/@href

当我在XPath Checker（Firefox扩展）中试用此XPath时，它一直都能完美运行。但是当我在Selenium中执行以下操作时：

System.out.println(selenium.getAttribute("//div[contains(@id, 'box')]/div/h4/small/a[contains(@href, 'google')]/@href"));

它不断给我以下日志错误：

14:30:56.311 INFO - Got result: OK on session 5a1401d374a04779bbe6f7fe9a0b4536
14:30:56.315 INFO - Command request: getAttribute[//div[contains(@id, 'box')]/div/h4/small/a[contains(@href, 'google')]/@href, ] on session 5a1401d374a04779bbe6f7fe9a0b4536
14:30:56.372 INFO - Got result: ERROR: Element //div[contains(@id, 'box')]/div/h4/small/a[contains(@href, 'google')]/ not found on session 5a1401d374a04779bbe6f7fe9a0b4536

我为解决这个问题而疯狂。有人看到我的代码行有任何错误吗？