Have I read the related troubleshooter articles above before posting (which pages?)? Yes
Have I searched the forum before posting? Yes
Have I read the documentation before posting (which pages?)? Yes
Joomla! version: 1.5.23
PHP version: 5.3.x
MySQL version: (unknown)
Host: rochen
Admin Tools version: pro
Description of my issue: Sometimes in virtuemart when i click add to cart shows 403 error access denied at index.php
At security log got this: reason -> bad behavior, target url->www.flowershopping.gr/index.php