I can not use the Global Variable in the subvi which be called dynamic

Hi,everybody,
i have a problem.
i called dynamic a subvi (subvi.vi) in the MainVI(main.vi),and putted it in the subpanel in the main.vi .the subvi should show the string (success!),but it not
why? Help me
WinXP LavVIEW8.0
Using LabVIEW 8.0.0 on Windows XP
附件:
MyTest.zip ‏16 KB
MainVI.JPG ‏41 KB
subvi.JPG ‏13 KB

subpanel中的VI要运行才可以。

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