datadeploy problem

System

hi,

My datadeploy was working fine. But when I added
* a new item in the tag UI and also created the corresponding new field in the database.
* also mapped the column name and value-from-field (no typo) correctly

I see the new item in the tag UI, save it with a value - but when I deploy, it updates as 'null' in the database. Other items from tag UI are updating properly.

Any pointers?

thanks
David