Mac doesn't connect over WiFi

Hi,
Since I updated my mac to 10.5.5 it doesn't automatically connect to my wireless, I have to click the airport thing and select my network and enter the WPA again.
Any help?

Now if I check my console just after a reboot, the logs said :
18/10/2008 10:54:13 kernel AirPort: Link Down on en1
18/10/2008 10:54:13 airportd[109] Error: Apple80211Associate() failed -6
18/10/2008 10:54:14 mDNSResponder[16] Note: Frequent transitions for interface en1 (169.254.182.90); network traffic reduction measures in effect
18/10/2008 10:54:14 mDNSResponder[16] Note: Frequent transitions for interface en1 (FE80:0000:0000:0000:021E:52FF:FE72:F30C); network traffic reduction measures in effect
18/10/2008 10:54:14 mDNSResponder[16] Note: Frequent transitions for interface en1 (169.254.182.90); network traffic reduction measures in effect
18/10/2008 10:54:18 mDNSResponder[16] Note: Frequent transitions for interface en1 (FE80:0000:0000:0000:021E:52FF:FE72:F30C); network traffic reduction measures in effect
A know if I connect manually (it's work) my WIFI connection, the logs said :
18/10/2008 11:01:03 kernel AirPort: Link Up on en1
18/10/2008 11:01:05 airportd[201] Error: SecTrustedApplicationCreateFromPath() = 100002 (UNIX[No such file or directory])
18/10/2008 11:01:05 airportd[201] Error: _ACKeychainSetPassword() Success! (0)
I just come to migrate of OSX 10.4.x in 10.5.5.
The automatic connection in Wifi worked well under 10.4.x But today under 10.5.5, the automatic connection doesn't work, either after a starting up, or after a setting in a stand-by mode.
I suspect 10.5.5 of being the cause
Message was edited by: Sush)i( Labs

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