Hostapd on Cubox-I 4pro

[spetke]

I'm using my cubox-I running arch linux as a 4g router. All the other things are working fine, but I seem not to be able to make hostapd work for more than 10 minutes before it crashes (The wifi just drops out from connected devices). I've searched this forum for answers but haven't found any. Does anyone have an idea what could I do about this? I've tried to find any clues from logs but to no real avail.

It seems that hostapd is working in a debian-image thats available from solidrun's forums but I sure would like to stick with arch linux because everything else works 100%.
here is my /etc/hostapd/hostapd.conf which works for few minutes just fine
$this->bbcode_second_pass_code('', '
bridge=br0
interface=wlan0
driver=nl80211
ssid=Kiinteajuoksu
channel=6
hw_mode=g
wpa=2
wpa_passphrase=notpostedhere
wpa_key_mgmt=WPA-PSK
rsn_pairwise=CCMP
logger_syslog=-1
logger_syslog_level=4
')

Thanks for your replies in advance
-Petteri