When you create an enterprise project and save it to Microsoft Project Server, it is not yet available for team members to view and update. The project is available only to you.
To make the project available to your team members, you must publish the project. Publishing a project also publishes its assignments. As your project progresses, you may have to make changes to your tasks and assignments. These changes must be published to make them available to your team members.
Start Project Professional 2010 and connect to Project Server.
Open the project, click the File tab, and then click Publish.
If you have made changes to the plan and haven't yet saved them, you will be prompted to do so. Click Yes to save the plan.
If you do not have a workspace site for this project, select Create a workspace for this project in the Publish Project dialog box.
Note: The collaboration commands and options are not available unless you are connected to Project Server.
If you have made changes to your project, but you aren't ready to share those changes with your team members, you can save the project to Project Server by clicking the File tab, and then clicking Save. Your changes will only be available to you. You can check the project in and out of Project Server to make changes. When you're ready to share your changes with team members, publish the project.'