postgres - pg_query works; pg_query_params doesn't

[Carol Walter <walterc@xxxxxxxxxxx>]

Hello,

I have a php 5 and PostgreSQL 8.3.6.  I wrote the original program  
using pg_query.  Now, I need to replace pg_query with  
pg_query_params.  I'm having trouble doing so.  In this code pg_query  
works but pg_query_params doesn't work.  The code snippet is as follows:

  if ($submit_info2 == "Submit")
	{
	 include "connect_km_tezt.php";  // Connect to database
	   if ($get_name == Submit)
	      {
/************* Query using pg_query  
*************************************/
/*	     $query2 = "SELECT \"fName\",\"mName\",\"lName\"
             		   FROM \"tblPeople\"
              		   WHERE \"peopleId\" = '$choose_name'";
           $result2 = pg_query($query2) or die("Can't execute  
query"); */
 /************  Query using pg_query_params   
***************************/
	      $query2 = pg_query_params('SELECT "fName","mName","lName"
             		   FROM "tblPeople"
              		   WHERE "peopleId" = $1', array($choose_name));
 /* Process query result */             		
           $rows2 = pg_num_rows($result2);
           echo $rows2 . " rows returned. <br />";
           while ($row2 = pg_fetch_array($result2))
              {
              $f_name_new = $row2['fName'];
              $m_name_new = $row2['mName'];
              $l_name_new = $row2['lName'];
              echo  "$fName $mName $lName <br />";
              }

           while (list($fName, $mName, $lName) =  
pg_fetch_row($result2))
              {
               echo  "$fName $mName $lName <br />";
               }
          }
          if ($Info2 != "None")
          {
        echo "<h2>You're entering a " . $Info2 . " for
   		 &nbsp;  $f_name_new &nbsp; $m_name_new &nbsp; $l_name_new </h2>  
";
   		}

The error message I get is as follows:

Internal Server Error

The server encountered an internal error or misconfiguration and was  
unable to complete your request.

Please contact the server administrator, root@xxxxxxxxxxxxxxxx and  
inform them of the time the error occurred, and anything you might  
have done that may have caused the error.

More information about this error may be available in the server error  
log.

Question #1.  Do you see why this isn't working.

Question #2.  Is there some way I can see the query that is being  
passed to the PostgreSQL server.

Question #3.  Can I put an "or die" clause on pg_query_params.

I'm not sure how to debug this code.

Thanks,

Carol