ccr1036-12g-4s

Hi all.. Pretty new to mikrotik and currently running an isp with the router i purchased. and that is ccr1036-12g-4s.
I have a couple of clients that are connected on the router on vlan interfaces. and public ip addresses for internet.
The problem i am having is once i enable queues some of the clients are not able to even load a single page no matter the capacity issued to them. The ccr1036 is running on v6.0rc14. All clients have a separate queue depending on the capacity they have purchased. i also have one who cant do anything even when his queue is disabled.

Any information on how to sort this out will be highly appreciated.

The first thing you should do is upgrade the OS to the latest version. You may not have a problem after that, but if you do then, please, post your config.