IE5 won’t launch WordPerfect

I’m hoping someone can help overcome a problem . . .

While clicking a Hyperlink, linking to a WordPerfect document, from within Word, WP, PP, etc, WordPerfect opens and the document loads (as expected).

However, if you click a Hyperlink from within IE5, nothing happens. Has anyone experienced this problem? Does anyone know why this happens and a way to overcome it?

Any advice would be greatly appreciated.

Thanks

Brian