wlan problems

Hello!
I have a strange problem. The wlan isn't working in the moment.
I wrote a script wlanUp, which has the following content:

iwconfig wlan0 essid FamilyWLAN freq 2.412G nick "" rate 11M mode managed
ifconfig wlan0 192.168.1.2 netmask 255.255.255.0 up
route add default gw 192.168.1.100

Most time it works without no problems.
But in the moment, I don't get an error message, but the led is flashing
red. Connection not possible.

Has anybody a hint, where I can search?
I can't remember that I have done something, so I'm surprised.
I upgraded today 18. May 04 using unstable.

Thanks
     karsten
Received on Tue May 18 2004 - 12:14:16 EDT