There are a number of places where mapping takes place, and you may need to re-run the library migration to get them all to tie up. In general you can map PADS Desiger Properties to database table field names in Databook (via the configuration). But one thing to consider is that PADS Designer maps between the uppercase property names (which were the original ATTRIBUTE names in pre-iCDB versions of the tool) and mixed case when placing parts into the schematic editor. In the integrated flow therefore if you place a symbol into the schematic it should map VALUE to Value, this is controlled by the map.cfg file. First check this is set up, in the map.cfg file, you should see an entry like:
"VALUE" \= "Value"
Also check a typical symbol file to ensure that VALUE is the name of the property on the symbol and not Value.
Next check the Databook database for field names and if necessry map VALUE to Value in the Databook configuration. Finally change the database table to list VALUE as a string an not Real, though it is preferable to use the real type gives more accurate search results and unit conversion.