Command buton and images in XP

the new command button in VB.NET has the ability to add an image as well as text (about time). But if I use a manifest file to give the XP look and feel if the user has Windows XP, the images go away when I set the FlatStyle Property to System.

Does anybody know a way around this or do my XP users not have icons on their buttons. I can change the properties on form load in code once I detect which operating system they are running, but seems like a strange restriction.

any ideas

thanks
Brian