Office Shortcut Bar won’t remain on top

My Office 2000 Shortcut Bar is set to be always on top. Inevitably, it stops staying on top. I fix it by entering the customise menu, deselecting always on top and reselecting always on top.

I have yet to take note of any user action associatedwith the shortcut bar “forgetting” to stay on top. Is there a way to make the shortcut bar “remember” to always stay on top?