ringtones in itunes but not syncing to iphone

The ringtones are available when selecting Ringtones under Library in the iTunes source list and if so, do you have Sync Ringtones selected under the Ringtones tab for your iPhone sync preferences with iTunes and are the ringtones available under the Ringtones tab for your iPhone sync preferences as well?
 MacBook Pro 15" Intel Core 2 Duo/2.53GHz/4GB RAM/500GB HD Mac OS X (10.6.6)  iPod w/Video 30GB,  iPhone 4 32GB

where do i find that in itunes to check off?
iphone 4g iOS 4

The iTunes source list is available to the left of the main iTunes window with Library at the top.
Under Library should be the following categories.
Music
Movies
TV Shows
Podcasts
Books
Apps
Ringtones
Radio
You want to view all music in your iTunes library, select Music. You want to view all Ringtones in your iTunes library, select Ringtones.
To view the various tabs for your iPhone sync preferences with iTunes, select your iPhone under Devices in the iTunes source list. The various tabs for your iPhone sync preferences with iTunes will be available in the main iTunes window with Ringtones being one of them.
iTunes on your computer includes Help and Tutorials, and you may want to at least glance through the iPhone user guide. Apple includes a Safari bookmark to the iPhone user guide on your iPhone.
 MacBook Pro 15" Intel Core 2 Duo/2.53GHz/4GB RAM/500GB HD Mac OS X (10.6.6)  iPod w/Video 30GB,  iPhone 4 32GB