Failure to update data in database table from webdynpro.

Hi Experts,

I wanted to add a extra tab in a cproject.

I added the tab using SPRO.

Now i have a tab in the c project all the fields are viewabale also the search help is active from the domain level.

These domains are user defined and the fields used in the webdynpro tab are from the include of the table dpr_project.

My problems is the data that i enter in the fields in the cprojects's tab is not replicated in the Dpr_project table.

Can u sugeest the possible way to update the data of database table by the data entered in the cproject tab?

Thanks in advance.