FREETEXT FILTER ON FREETEXTTABLE USING COLUMN LIST FOR REFINED SEARCH

I am trying to do a freetext filter with mutiple columns using a column list, but I can't get the syntax down for multiple column list. First, am I am going about this the right way...Do I need to be doing both? Second why doesn't mutiple columns work. I can't find any good samples online. What I am trying to accomplish is a refined search stored procedure that uses the freetext to do the search refinement. Any help would be appreciated.

select

b.rank,

a.ProductID,

a.ProductName,

a.Sequence,

a.ProductImage,

a.ItemID,

a.ItemName,

a.ManufacturerItemCode,

a.ItemImage,

a.ItemSourceID,

a.PackageID,

a.BrandID,

a.BrandName,

a.ManufacturerID,

a.ManufacturerName,

a.ProductCategoryID,

a.CategoryID,

a.CategoryName,

d.CustomerGroupName,

isnull(h.PackageDescription,a.ItemPKG) as PKG,

case g.StockStatus

when 1 then 'Yes'

when 0 then 'No'

else ''

end as StockStatus,

isnull(g.StandardUnitPrice,a.ListPrice) as Price,

isnull(j.SupplierAbbreviation,a.ManufacturerAbbreviation) as ItemSource

from

dbo.vw_mcProductItem a

inner join freetexttable(dbo.vw_mcProductItem, (ProductName,ItemName,ManufacturerItemCode,ItemPKG,BrandName,ManufacturerName,ManufacturerAbbreviation,CategoryName), @SearchWord) as b ON a.ItemID = b.[KEY]

inner join [dbo].[mcCustomerGroupItem] c on c.ItemID = a.ItemID

inner join [dbo].[mcCustomerGroup] d on d.CustomerGroupID = c.CustomerGroupID

inner join [dbo].[mcCustomerGroupCustomer] e on e.CustomerGroupID = d.CustomerGroupID

inner join [dbo].[mcCustomerUser] f on f.CustomerID = e.CustomerID

left outer join [dbo].[mcSupplierItem] g on g.ItemID = a.ItemID

left outer join [dbo].[mcPackage] h on h.PackageID = g.SellingPackageID

left outer join [dbo].[mcItemSource] i on i.ItemSourceId = a.ItemSourceId

left outer join [dbo].[mcSupplier] j on j.SupplierID = g.SupplierID

where

d.CustomerGroupID = @CustomerGroupID

and f.UserID = @UserID

and FREETEXT(BrandName,ManufacturerName,CategoryName, @SearchWord)