Fix:

  function query($Query_String) {
      $this->connect();
      
      $this->Query_ID= ora_open($this->Link_ID);
      if(!ora_parse($this->Query_ID,$Query_String)) {
	  	$this->Errno=ora_errorcode($this->Query_ID);
	  	$this->Error=ora_error($this->Query_ID);
      } else {
        /*  THIS IS THE FIX!! */
        if(ora_exec($this->Query_ID)) {
	        $this->Errno=ora_errorcode($this->Query_ID);
	        $this->Error=ora_error($this->Query_ID);
        }
        /* END OF FIX!! */
      }
      $this->Errno=ora_errorcode($this->Query_ID);
	    $this->Error=ora_error($this->Query_ID);
      $this->Row=0;

      if($this->Debug) {
	  printf("Debug: query = %s<br>\n", $Query_String);
	  printf("<br>Debug: Query_ID: %d<br>\n", $this->Query_ID);
      }
      
      if(!$this->Query_ID) {
	  $this->halt("Invalid SQL: ".$Query_String);
      }
      
      return $this->Query_ID;
  }