registering an array into a session (?)

Can somebody please help me out?? I'm going nuts... what's wrong with this piece of code? <pre>

                if(!isset($script_total_time))
                {
                        // register the session variables to keep track of step times
                    $script_total_time=(float)$total_time;
                        session_register("script_total_time");
                        $step_times_array[$step]=$total_time;
                        $step_times=serialize($step_times_array);
                        //echo "step_times=\"$step_times\""; <- this echoes perfeclty
                        session_register("step_times");
                }
                else
                {
                        // update session variables
                    $script_total_time+=(float)$total_time;
                        $step_times_array=unserialize($step_times);
                        $step_times_array[$step]=$total_time;
                        $step_times=serialize($step_times_array);
                }

</pre> why doesn't $step_times gets registered correctly? it always register an empty var... ____________________________ . Christian Dechery (lemming) . http://www.tanamesa.com.br . Gaita-L Owner / Web Developer