本人刚安装了西门子STEP 7 V5.3 SP2中文版几天，当时使用了一次一切正常，可今天开机点SIMATIC Manager 出现"Cannot establish connection to the AutomationLicense Manager service"的错误提示,点Automation　License Manager 出现＂The ' Automation License Manager service' has not been started! Please start the service.的提示．不知该如何解决，请各位指教．谢谢！