Work real allocation is not possible with many activities

I have use the last version v4.2.3, I added several activities when I have try to update the "work real allocation" he sets a lot of time to make the action and at the end (25 min aprox) I have to close the explorer because he does not capable to save the change. I have no error message. If I make the same thing with a user who has fewer tasks, the application makes the update.

# rpm -qa | grep -i php
php-cli-5.3.3-1.fc12.i686
php-mcrypt-5.3.3-1.fc12.i686
php-pdo-5.3.3-1.fc12.i686
php-mbstring-5.3.3-1.fc12.i686
php-gd-5.3.3-1.fc12.i686
php-5.3.3-1.fc12.i686
phpMyAdmin-3.3.8-1.fc12.noarch
php-mysql-5.3.3-1.fc12.i686
php-xml-5.3.3-1.fc12.i686
php-common-5.3.3-1.fc12.i686

# rpm -qa | grep -i mysql
mysql-server-5.1.47-2.fc12.i686
perl-DBD-MySQL-4.017-1.fc12.i686
pam_mysql-0.7-0.9.rc1.fc12.2.i686
mysql-5.1.47-2.fc12.i686
opensips-mysql-1.6.3-1.fc12.i686
php-mysql-5.3.3-1.fc12.i686
mysql-libs-5.1.47-2.fc12.i686

# rpm -qa | grep -i httpd
httpd-2.2.15-1.fc12.2.i686
httpd-tools-2.2.15-1.fc12.2.i686

I can't use "max_input_vars" with PHP 5.3.3, i think is available with 5.4.x?
I will try to add in php.ini?
Thanks,

I tried to change the php.ini and .htaccess with max_input_vars = 4000 and that does not work.
I had to change the file /projeqtor/view/main.php and add:
ini_set('php_value max_input_vars',4000);
and now work.

Example:

<?php
/* ============================================================================
* Main page of application.
* This page includes Frame definitions and framework requirements.
* All the other pages are included into this one, in divs, using Ajax.
*
* Remarks for deployment :
* - set isDebug:false in djConfig
*/
require_once "../tool/projeqtor.php";
header ('Content-Type: text/html; charset=UTF-8');
ini_set('php_value max_input_vars',4000);
scriptLog(' ->/view/main.php');
if (Sql::getDbVersion()!=$version) {
//Here difference of version is an important issue => disconnect and get back to login page.
//session_destroy();
Audit::finishSession();
include_once 'login.php';
exit;
}
$currency=Parameter::getGlobalParameter('currency');


Thank you for your assistant.