I just can't figured it out why after i install iwork '09 out from CD, only keynote won't open. I did the procedure 3 times already on my macbook pro lion... installation and software upgrades and such... but still only keynote won't install properly. Instead, it requires serial number to think it should not because it comes from the CD. The rest like pages and numbers are both working properly. I need help... i don't know what to do anymore.