wifi module can't scan any more

[rain blue <b123114 gmail com>]

Dear,

       I meet some issue. Could someone help me?

version; NetworkManager 0.8

            NetworkManager-Applet 0.8 ( I modify to no GUI )

            wpa_supplicant 0.6.9

Issue step:

1.connect AP ( Success!!! ).

2.ping network over 2~~3 hours.

3.wifi will auto disconnected.

4.And it will be not connect AP or scan any AP.

I try to use other system 

1.ubuntu 10.04  -- pass ( if i always scan AP or Get strength from NetworkManager. over 6~7 hours fail) 

2.RTOS            -- fail

when wifi module crash. 

I use applet, iwlist or dbus-send wpa_supplicant that get AP ssid.

there do not work.......

it must be re-power-supply to module.

that will recover.

So, I don't no how i can guess that is driver, HW or system issue.

And how can i let module crash acceleration in other system.

blue