.net - Sharepoint Object Model vs WebServices -

i had created xml query sending sharepoint search service returning results. pulled sql query text out of , started using object model , it's not working. doing wrong based on code below?

query xml (returns results):

<querypacket xmlns="urn:microsoft.search.query" revision="1000">                                     <query domain="qdomain">                                      <supportedformats><format>urn:microsoft.search.response.document.document</format></supportedformats>                                      <context>                                        <querytext language="en-us" type="mssqlft"><![cdata[ select title, rank, owspublished1,owssocialx0020networkx0020update, description, write, path scope()   order "rank" desc ]]></querytext>                                      </context>                                      <range><startat>1</startat><count>20</count></range>                                      <enablestemming>false</enablestemming>                                      <trimduplicates>true</trimduplicates>                                      <ignoreallnoisequery>true</ignoreallnoisequery>                                      <implicitandbehavior>true</implicitandbehavior>        <includerelevanceresults>true</includerelevanceresults>                               <includespecialtermresults>true</includespecialtermresults>                         <includehighconfidenceresults>true</includehighconfidenceresults>                                     </query></querypacket> 

object model code (doesn't):

        spsite site = new spsite("http://sp-dev/");         servercontext sc = servercontext.getcontext(site);         fulltextsqlquery ftq = new fulltextsqlquery(sc);         string querysql = @"select title, rank, owspublished1,owssocialx0020networkx0020update, description, write, path scope()   order ""rank"" desc ";          ftq.querytext = querysql;;         resulttablecollection results = ftq.execute(); 

you need @ least add:

ftq.enablestemming = false; ftq.trimduplicates = true; ftq.ignoreallnoisequery = true; ftq.keywordinclusion = keywordinclusion.allkeywords; 

to @ least make fair comparison between 2 methods. then, can try:

ftq.authenticationtype = queryauthenticationtype.pluggableauthenticatedquery;