Adding Automator workflow onto the toolbar
 

I created an automator action to export OO files to OPML in a specific folder on my HD. Curiously, while the action works when launched from Automator.app or from the Finder, it hangs when it is launched from the OO toolbar (I have customized my toolbar to include the workflow).

I wonder, could it be that the toolbar can only launch Applescripts and not Workflows?

Thank you.