You must always deploy your data model to the MDM server for any changes you made to be taken into account at runtime.
To deploy a data model to the MDM server, do the following:
In the MDM Repository tree view, right-click the data model you want to deploy, and select Deploy To....
A dialog box pops up, allowing you to add dependencies for the selected data model.
In this example, click Add Dependencies and then click Continue.
In the [Select a server location definition] dialog box, select the server where you want to deploy the data model, and then click OK.
A dialog box pops up, indicating that the deployment is successful.
Click OK to complete deploying the data model.
You have now finished preparing your simple MDM project.