Importing IE Favorites Into Safari iPhone

This problem was also posted in the Synching discussion group, but no solution was forthcoming, so Im trying in the Apps posting as well.
I have XP SP3 and iPhone 4. When I originally set the iPhone up, all my IE Favorites were successfully imported into Safari. Since then, I have made numerous changes to my IE7 Favorites. However, when I synch my iPhone under iTunes, the Favorites in Safari are never updated. How can I get my new IE Favorites to be updated in my Safari Browser on my iPhone.
Any help greatly appreciated.
iPhone 4 and XP Pro SP3 Windows XP Pro Wireless home network, Apple IPhone 4 use