Wireless ACL + client-tx-limit

Hello.
I have something like that:

/interface wireless access-list
add ap-tx-limit=4000000 authentication=yes client-tx-limit=1000000 comment="" disabled=no forwarding=no interface=wlan1 mac-address=00:15:6D:xx:xx:xx management-protection-key="" private-algo=none private-key="" private-pre-shared-key="" signal-range=-120.120

Why client-tx-limit not work? Client can upload even 20M. Ap-tx-limit works fine.
Change from "int=wlan1" to "int=all" nothing helps.

jul/15/2011 10:52:04 by RouterOS 4.17

Is client CPE RouterOS based?:

http://wiki.mikrotik.com/wiki/Manual:Interface/Wireless#Access_List
client-tx-limit (integer [0..4294967295]; Default: 0) Ask client to limit rate of data transmission. Value 0 means no limit.

This is a proprietary extension that is supported by RouterOS clients.
Value is in bits per second.

Now i see - here cpe is Ubiquiti.
In other docs isn’t say that.
Thanks.