Using EPiServer Search for files

I have installed EPiServer Search and it works fine to search for pages. However, I can't get it to include files in the search results. Searching files works in the edit mode so indexing seems to work.

This is the way I fetch the SearchResults

			var fieldQuery = new GroupQuery(LuceneOperator.AND);
			fieldQuery.QueryExpressions.Add(new FieldQuery(query));
			fieldQuery.QueryExpressions.Add(aclQuery);
			var fuzzyQuery = new GroupQuery(LuceneOperator.AND);
			fuzzyQuery.QueryExpressions.Add(new FuzzyQuery(query, 0.8f));
			fuzzyQuery.QueryExpressions.Add(aclQuery);
			var completeQuery = new GroupQuery(LuceneOperator.OR);
			completeQuery.QueryExpressions.Add(fieldQuery);
			completeQuery.QueryExpressions.Add(fuzzyQuery);
			var res = SearchHandler.Instance.GetSearchResults(completeQuery, page + 1, pageSize)
				.IndexResponseItems;

Any ideas of how to fix this?

Best,

Marcus