Think about how you act everyday; employees learn more about you from your behaviour than they do from your messages.
You tell employees that they are important to you, but:
You never ask them how their day is going; it’s because of your crazy schedule.
You walk by them all the time with your head down, thumbing your Blackberry.
You don’t have time to answer their questions or meet with them.
If this is the case, you can post messages on your Intranet site and send them all the memos in the world about how important they are to you but because of what you do, but they won’t believe you.
If employees really are important to you, you need to show them, not tell them.
Then, and only then, will they get the message.