I have create one Choice Field Column DocType with Two Choice Value
i. Change Request ii.Technical Document
in Share document and Each Document assign value with DocType.
Here is Snippet :

than after Go to : central Administration > Application mngt > mngt service application > Fast Query SSA > Content Sources.
and did crowling. after completed create Metadata Properties.
Property name is : doctype and mapping with ows_DocType(Text)
after this again Crowling in Fast Query SSA. Also be doing Crowling on Fast Content SSA.
In Fast Search Center Page.
i have add new category in refinement panel webpart.
<Category Title="Document Type" Description="Document Classification" Type="Microsoft.Office.Server.Search.WebControls.ManagedPropertyFilterGenerator" MetadataThreshold="1" NumberOfFiltersToDisplay="2" MaxNumberOfFilters="20" ShowMoreLink="True" MappedProperty="doctype" MoreLinkText="show more" LessLinkText="show fewer" ShowCounts="Count"/>
During Filtering Result on Fast Search Page

nothing customize with refinement panel. i have also be uncheck Use Default Configuration.
Is this right ways?anyone guide plz.
