What's VFP version?

>In a certain system, commands Edit-Copy, Edit-Cut and Edit-Paste are now permanently disabled. (It used to work.) The framework uses a UDF(), e.g. OnSkipMenu("EDIT_COPY"), to disable menu items. Using the debugger, I found that for EDIT_COPY, the function is evaluated only the first time I click on the menu. For other menu items (FILE_EXIT, for instance), the disable-function gets evaluated every time I click on any menu. Why does this happen? How can I force the menu item for Edit-Copy (which, of course, uses the respective menu bar#) to re-evaluate?
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>TIA, Hilmar.