Word plugin not finding Zotero

I have tried installing both 1.0b1 and 1.0b3 versions of this plugin. With both, as soon as I try to use any of the toolbar buttons I get the following message: "An error occurred communicating with Zotero. Please ensure Firefox is open and try again." Firefox is of course open, and I have tried this both with and without Zotero actually showing. I apparently have the latest update of Zotero. My Firefox version is, I am using Windows XP SP2 and Word 2003.
Any ideas?
Many thanks,
  • Please see this thread, particularly my later posts in it, for how to debug the problem (Report Errors, trying in a new document, etc.), and post additional info there.
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