At work try http://www.google.com/search?hl=en&q=RESOLVED+%22Send+to+Mail+Recipient%22&btnG=Google+Search
Should take you about 3 tries.
At my job, we just upgraded from Office 2000 to Office 2007...now, when I right-click on any file on the Desktop or in Windows Explorer, the "Send to Mail Recipient" does not work and returns an error something to the effect of "Outlook cannot open, please close and try again" (I'm paraphrasing here). The right-click "Send to Mail Recipient" worked fine and I had not problems prior to upgrading to Office 2007. How do I fix this? We are running Win XP Pro & Office 2007 on Dell Dimension desktops.