求助：运行DC时报告system clock has been set back.错误

详细信息如下：
Unable to obtain feature 'Design-Compiler' because:
Error:Internal licensing error number -88:System clock has been set back.
Feature: Design-Compiler
License path: XX/XX/XX/XX(my license path)
FLEXnet licensing error:-88,147
For further information,refer to the FLEXnet Licensing End User Guide,
available at "www.macrovision.com"..(SEC-17)
Fatal: Design-Compiler is not enabled.(DCSH-1)

安装的是200809版的DC，服务器的时间比正常时间晚几个月，不知道问题出在哪里了，困扰啊！

已解决。
没人回复，大概是因为问题太简单了吧，后面若有人遇到相同问题请联系我，没有的话就当我自娱自乐了，呵呵！

麻烦您告诉一下解决方法，谢谢，我安装Inplan 也出现了这个问题。

是什么原因呢?

:handshaek :v

Unable to obtain feature 'Design-Vision ' because:
Error: Internal licensing error number -88: System clock has been set back.
Feature:Design-Analyzer
License path:27000@localhost.localdomain
FLEXnet Licensing error:-88,147
For further information, refer to the FLEXnet Licensing End User Guide,
available at "www.macrovision.com".. (SEC-17)
Unable to obtain feature 'Design-Analyzer ' because:
Error: Internal licensing error number -88: System clock has been set back.
Feature:Design-Analyzer
License path:27000@localhost.localdomain
FLEXnet Licensing error:-88,147
For further information, refer to the FLEXnet Licensing End User Guide,
available at "www.macrovision.com".. (SEC-17)
Fatal: At least one of the following must be enabled : Design-Vision, Design-Ana lyzer. (DCSH-10)
以前DC能正常使用，现在突然出现了同样的问题