Hello, I am totally new to linux but hope I can learn from you all.

Opensuse 11.2 comes with a nice Network Manager application and when I first configured my wireless network everything went ok. Unfortunately after shutting down and turn it back on somehow it is being detected but could not enable it again.

This is the current status I am getting

#lspci|grep -i wireless

02:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
#iwconfig wlan1

wlan1 IEEE 802.11bgn ESSID:"PUBLIC-CIT.FH-Koeln.DE"
Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
Tx-Power=20 dBm
Retry long limit:7 RTS thr: off Fragment thr: off
Encryption key: off
Power Management: on
Link Quality: 0 Signal level: 0 Noise level: 0
Rx invalid nwid: 0 Rx invalid crypt: 0 Rx invalid frag: 0
Tx excessive retries: 0 Invalid misc: 0 Missed beacon: 0

Looking forward to your reply. Thanks!

Do you know what driver module you are using for this card?

Thanks for your reply, the driver is ath9k. I attach the command I run.

# hwinfo --wlan
21: PCI 200.0: 0282 WLAN controller
[Created at pci.318]
UDI: /org/freedesktop/Hal/devices/pci_168c_2b
Unique ID: PL6s.8lvD45FXCI3
Parent ID: qTvu.8Makl3iDVc3
SysFS ID: /devices/pci0000:00/0000:00:1c.1/0000:02:00.0
SysFS BusID: 0000:02:00.0
Hardware Class: network
Model: "Atheros AR9285 Wireless Network Adapter (PCI-Express)"
Vendor: pci 0x168c "Atheros Communications Inc."
Device: pci 0x002b "AR9285 Wireless Network Adapter (PCI-Express)"
SubVendor: pci 0x105b "Foxconn International, Inc."
SubDevice: pci 0xe017
Revision: 0x01
Driver: "ath9k"
Driver Modules: "ath9k"
Device File: wlan1
Features: WLAN
Memory Range: 0xd2500000-0xd250ffff (rw,non-prefetchable)
IRQ: 17 (no events)
HW Address: 2c:81:58:e9:e3:2f
Link detected: yes
WLAN channels: 1 2 3 4 5 6 7 8 9 10 11 12 13
WLAN frequencies: 2.412 2.417 2.422 2.427 2.432 2.437 2.442 2.447 2.452 2.457 2.462 2.467 2.472
WLAN encryption modes: WEP40 WEP104 TKIP CCMP
WLAN authentication modes: open sharedkey wpa-psk wpa-eap
Module Alias: "pci:v0000168Cd0000002Bsv0000105Bsd0000E017bc02sc80i00"
Driver Info #0:
Driver Status: ath9k is active
Driver Activation Cmd: "modprobe ath9k"
Config Status: cfg=no, avail=yes, need=no, active=unknown
Attached to: #10 (PCI bridge)

can you post the output of:
ifconfig
ifconfig -a
lsmod | egrep "(ath9k|802)"
maybe you need to do something like: