Data Modeler not found

Hi,

I'm learning Web Dynpro programming with NetWeaver Developer Studio.

Following the direction step by step in the tutorial I tried to map the comtext:

To open the Data Modeler, choose Open Data Modeler from the context menu for the component name in the Web Dynpro Explorer. To

But I haven't found the entry in the context menu. There are only:

edit, delete, message editor, prpair component interface, Repair and internal node info

in the context menu of the component I built.

What's wrong with it?

thanks