I have the following configuration:

<add name="SiteSearchIndexer" type="UmbracoExamine.UmbracoContentIndexer, UmbracoExamine"
runAsync="true"
supportUnpublished="true"
supportProtected="true"
interval="10"
indexSet="SiteSearchIndexSet"
analyzer="Lucene.Net.Analysis.WhitespaceAnalyzer, Lucene.Net"/>

    <IndexSet SetName="SiteSearchIndexSet" IndexPath="~/App_Data/TEMP/ExamineIndexes/SiteSearch/">
        <IndexAttributeFields>
            <add Name="id" />
            <add Name="nodeName" />
            <add Name="updateDate" />
        </IndexAttributeFields>
        <IndexUserFields>
            <add Name="content" />
            <add Name="metadescription" />
            <add Name="metakeywords" />
            <add Name="officeText" />
            <add Name="intro" />
        </IndexUserFields>
        <IncludeNodeTypes/>
        <ExcludeNodeTypes />
    </IndexSet>

Here is the code I use for searching:

var provider = (LuceneSearcher)ExamineManager.Instance.SearchProviderCollection["SiteSearchSearcher"];
var results = provider.Search(query, true, "");

If I search for ONE word, it works fine. If I search for two words, it never finds anything. What's wrong with my configuration?