i dont know what the problem is but airodump- will stop capturing the data after 30 min or so .. i have to remove the wireless air with
airmon-ng stop ath0
airmon-ng start wifi0
and airodump will work again .. and it will stop working after 30-45 min?
does anyone know what is going on?

i updated to the latest madwifi
and used .9 of the aircrack suite.