Low bandwidth on RB150

Hi,
i have MT RB150, 2 computers connected to 2 eth ports.
First have IP 192.168.1.2, second 192.168.2.2. Copying files between computers is very slow, about 2-5Mbits/sec.
I have queue, mangle and so on.

Where could be the problem? Even if i download from internet some files, it is much faster (5Mbits, but stable).

Probably queue and mangle set such limit to the download/upload.

Base stations router :

RB/150
shaper: 17
rules firewall: 4
networks: 15
work interface ethernet : 3
interface VLAN: 12

avarage traffic: 6mbit/1mbit
cpu load: 70-80%
loss packet: no

peak traffic: 9mbit/2mbit
cpu load: 100%
loss packet: 5%

I am used field ToS
for division traffic (mangle/packet mark),
all clent traffic encapsulation 802.1q ,


iperf test (simple routing):

flow=1 packet=1.5k (send): 48Mbit
flow=1 packet=1.5k (send&recieve): ~20mbit

no queues , no firewall, no vlan