问题已经解决了！下载了最新的HF2补丁，就没有这样的问题了！

附上HF2的下载地址：

1.Information on Hotfix 2

Readme_WinCC_flexible_2008_HF2 ( 128 KB )

Readme_WinCC_flexible_2008_HF2

[URL]http://support.automation.siemens.com/WW/livelink.exe/csfetch/31796860/readme_wincc_flexible_2008_hf2.pdf?func=cslib.csFetch&nodeid=32812477[URL]

2.Hotfix 2 Download

WinCCflexible2008_HF2.exe

WinCCflexible2008_HF2.exe ( 60650 KB )
[URL]http://support.automation.siemens.com/WW/livelink.exe/csfetch/31796860/WinCCflexible2008_HF2.exe?func=cslib.csFetch&nodeid=32732665[URL]