exchange 2003 forward mail to Gmail

Hi all
I have an SBS server 2003 with exchange 2003

I have a user that wants to forward his mail to Gmail

I have set up a contact and set up his user account to forward mail to the contact
 Also marked the Tick box to deliver mail to the contact  and the user mailbox

I done the following as outlined here http://support.microsoft.com/kb/281926 
1.      Start the Active Directory Users and Computers snap-in.
2.      Expand the server, and then right-click Users.
3.      Click New, and then click Contact.
4.      Type a name.
5.      Click Modify, click SMTP, and then click OK to create the custom SMTP mail address.
6.      Type the SMTP e-mail address, click OK, click Next, and then click Finish.
Then I done the following
1.      Start the Active Directory Users and Computers snap-in.
2.      Right-click the mail-enabled user, and then click Properties.
3.      Click the Exchange General tab.
4.      Click Delivery Options.
5.      In the Forwarding Address section, click Forward to, and then click Modify.
6.      Click the mail-enabled user or the mail-enabled contact. Then, click OK.

Note If you want e-mail to be delivered to the original mailbox as well as the forwarding address, select the Deliver messages to both forwarding address and mailbox check box.
7.      To close Delivery Options and to close Properties, click OK two times.
 
Now the user receives some mail to his Gmail account and some mail to his user account

Have I done something wrong
I need to have all mail sent to both mailbox and Gmail

Thanks for any help

Robbie