Oulook links won't open in Firefox

Vista, FF3.05, and Outlook 2003.
When I click on a link in an Outlook message a box pops up and asks to Locate Link Browser. When I select firefox.exe I get the following error message. "Outlook cannot start the web browser for C://Program Files/MozillaFirefox/firefox.exe. The web address may be incorrect or your Web browser may not be properly installed".

 

Googled a bit. Try this:
http://forums.techguy.org/web-email/757463-solved-outlook-links-firefox-2.html

"With Outlook closed, try resetting IE to be the default browser from within IE, then closing IE, then opening Firefox and setting it to be the default browser."

Hope it will work.