MenuItem string name problem

I have a problem with controlling on external GUI menu

For Example:

When the menu was like that, it works:
WinMenuSelectItem($MANAGER_TITLE, "", "View", "Grades FW 3.x.x Logs...")

But now it should be like that, and it doesn't works:
WinMenuSelectItem($MANAGER_TITLE, "", "View", "Grades FW 3/4.x.x Logs...")

I thought it because the "/" on the menu item

How can I solve this?

Thanks.