CS5.5 want to change the number records returned for a repeat region from user input

Hello,

I am looking to allow the user to set the number of rows returned in a repeat region from the fixed amount set using Server Behaviours to a figure set by the person viewing the page.

I have seen that the code generated uses:

$maxRows_rsVenues = 20;

To start with I thought something simple. Either all records or the preset 20 rows at a time. I presume SESSION variables would be a good way to go so setting a form on the page with a checkbox (checked meaning ALL and unchecked for 20). (It gets me into how the coding works)

Having googled my requirement and read responses on using checkboxes and session variables I had the following theory

At start of page make sure session value exists:

if (!isset($_SESSION))

{

          session_start();

}

$_SESSION['listcount']='20';

In the body before the table created within the repeat region put

    <form id="form1" name="form1" method="post" action="">

      <p id="frmFilter">

        <input name="SeeAll" type="checkbox" id="SeeAll" value="1" />

        <label for="SeeAll">SeeAll</label>

        <input type="submit" name="Set Filter" id="Set Filter" value="Set Filter" />

      </p>

    </form>

    <?php

                    if (isset($_POST['Submit'])) {

                              if ($_POST['SeeAll'] == '1')

                              {

                                  $_SESSION['venuelistcount'] = '999999';

                              } else {

                                  $_SESSION['venuelistcount'] = '20';

                              }

  }

?>

<?php echo "LIST COUNT: ".$_SESSION['venuelistcount']; ?>

The problem is the Session variable never seems to be modified. Can someone explain what I have misunderstood, or perhaps a better option to implement what I want.

Thanks