I have created a custom column called "CaseCode" which will be associated with every document that is uploaded into the SharePoint 2010 document library. I need to be able to search for documents in the doc library on the CaseCode value (which will not be unique) using SP web services from a .NET DLL. The result set will be displayed on a web page.

I have successfully managed to connect to SP's "Search" web service and perform a search, but no matter what I do the result set is always empty (or the XML says "no results found"). No errors, it just never finds any of the existing docs in the library.

What am I missing? Surely it must be something very simple? How do you specify a custom column in the "Search" service? Any help appreciated!