Problem Traffic shapping base on L7

have any one tried traffic shaping/prioritization using this guide on ROS v6

it was working fine with V5
i contacted support and they asked me to change all chains in from prerouting/postrouting to forewad in mangle after this the counter in mangle rules started increasing but in queue tree it rarely increases
that means it’s not working and i have got no further updates from support since 2 days

can any one check and confirm this
http://wiki.mikrotik.com/wiki/Basic_traffic_shaping_based_on_layer-7_protocols
Thanks