[photoshop-beginners] Downloading raw images from Canon 5dii

I am having trouble downloading raw images from Canon 5dii on Photoshop cs4?
It is saying it can't recognize the format. Have not had trouble with other RAW images????
Anybody have any ideas????
Thanks,
Bill

------------------------------------

Please check out our sister group, attachments allowed-Photoshop by Example http://groups.yahoo.com/group/ps-by-ex/ Yahoo! Groups Links

<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/photoshop-beginners/

<*> Your email settings:
Individual Email | Traditional

<*> To change settings online go to:
http://groups.yahoo.com/group/photoshop-beginners/join
(Yahoo! ID required)

<*> To change settings via email:
photoshop-beginners-digest@yahoogroups.com
photoshop-beginners-fullfeatured@yahoogroups.com

<*> To unsubscribe from this group, send an email to:
photoshop-beginners-unsubscribe@yahoogroups.com

<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/