RB433AH cm9 in 2,4b/g Hotspot Problem

Recently we’ve installed a rb433ah with cm9, 30cm pigtail, 1m ufl-ufl cable and wavearena 12db omni antenna.The altitude is about 10meters.
The free space is 500 meters on every side.
There are lots and lots of other ap in 2,4Ghz but I am in channel 1 which has only 2 others.

My problem is that when I connect with my laptop from a 60meters distance everything works ok even when I am excactly below the antenna.
When I go to 100meters distance ,with a visual of the antenna-nothing in between, I get full signal, I get a local ip from dhcp instantly but the hotspot page takes forever and every other page after that.They load but they load forever.
(Ex. I get to youtube but streaming of the video takes forever)

Wlan1 (CM9)-Hotspot:
2,4B/G - ap bridge
rates default
Overall TxCCQ=20%
Ack Timeout=53us
Noise floor = -96db

What could be wrong with this CCQ?I can post any configs that you want.Just point me to the right one.