queue tree and web proxy

hello
we need a help to solve this problem, we use mikrotik 2.9 to share an internet connection, we enable the web proxy.
for th bandwith we use the queue tree it’s work with out proxy, but when we force iexplorer to use proxy the queue tree don’t work, here is our configuration

chain=srcnat out-interface=Public action=masquerade

queue type :

5 name=“My_pcq_connection_up” kind=pcq pcq-rate=0 pcq-limit=50
pcq-classifier=src-address,src-port pcq-total-limit=2000

6 name=“My_pcq_connection_down” kind=pcq pcq-rate=0 pcq-limit=50
pcq-classifier=dst-address,dst-port pcq-total-limit=2000

queue tree :

6 name=“portable_down” parent=Download packet-mark=portable limit-at=0 queue=My_pcq_connection_down priority=8
max-limit=128000 burst-limit=512000 burst-threshold=100000 burst-time=40s

7 name=“portable_up” parent=Upload packet-mark=portable limit-at=0 queue=My_pcq_connection_up priority=8 max-limit=32000
burst-limit=64000 burst-threshold=24000 burst-time=20s