How do you use docBoost in CFIndex

Hello,

I'm trying to use docBoost with CFIndex and whenever I use it, none of the documents get added to the index.  It doesn't throw an error but nothing gets added or updated in the collection.  Here is an example:

<cfindex

                                        query="getFiles"

                                        collection="#variables.documentCollection#"

                                        urlpath="URLPath"

                                        action="UPDATE"

                                        key="keyPath"

                                        category="categories"

                                        title="Title"

docboost="3"

                                        productID_i="SecurityProdID"

                                        restrictContractor_b="restrictContractor"

                                        release_s="version"

                                        added_dt="addedDate"

                                        updated_dt="last_revision"

                                        altTitle_t="Title"

                                        boosted_i="prefValue"

                                        type="FILE"

                                        status="searchStatus" />

However, if I leave out docBoost the documents index fine.  Anyone?