802.11n networking via new airport extreme to airport express/ airtunes

Have been trying to include an airport express in my new 802.11n/ new airport extreme network, using new airport utility. Does not seem to work yet manuals/ the support site do not seem to rule this out. I would just like to stream itunes to remote powered speakers via airport express. Can I do this or do I have to wait for a "new" 802.11n airport express to be produced?
Thanks!
macbook (black)   Mac OS X (10.4.9)  

I don't have much experience in this area, but I can assure it's supposed to be able to work together seamlessly. So no you should have to wait.
Have you tried basic troubleshooting? (repair permissions, reinstall software, reboot, etc.)

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