3Com OfficeConnect USB will not associate with access point

Running OpenSuSE 11.2 32 bit dual boot with XP.
3Com OfficeConnect Wireless 11g USB dongle connects and works happily in XP. Can not get it to associate with the same AP in Linux.
Device identified as:
Device 3CRUSB10075 wlan0
Driver zd1211rw

Appears to be installed, to the extent that it sees the broadcast SSID.
Output of /usr/sbin/iwlist scan correctly identifies the ESSID and encryption (disabled)

More particularly, /usr/sbin/iwconfig outputs that the “Access Point: Not-Associated”

linux-tgb6:~ # /usr/sbin/iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

wmaster0 no wireless extensions.

wlan0 IEEE 802.11bg ESSID:“gRuMb13”
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:off
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

I have tried all possible configuration settings, including DHCP and static IP, disabled the firewall etc. Nothing I’ve found has worked.

I attach here what I hope is the relevant output lines of dmesg. Can anyone decipher these and point me in the right direction?
BTW there is a line indicating “Calling CRDA for country: US”. I am in the UK. Is this relevant?

993.856191] usb 1-6: new high speed USB device using ehci_hcd and address 3
993.991131] usb 1-6: New USB device found, idVendor=6891, idProduct=a727
993.991150] usb 1-6: New USB device strings: Mfr=16, Product=32, SerialNumber=0
993.991159] usb 1-6: Product: 3CRUSB10075
993.991165] usb 1-6: Manufacturer: 3COM
993.991606] usb 1-6: configuration #1 chosen from 1 choice
994.200878] cfg80211: Calling CRDA to update world regulatory domain
994.532190] usb 1-6: reset high speed USB device using ehci_hcd and address 3
994.868998] phy0: Selected rate control algorithm ‘minstrel’
994.870699] zd1211rw 1-6:1.0: phy0
994.870813] usbcore: registered new interface driver zd1211rw
996.314550] usb 1-6: firmware: requesting zd1211/zd1211_ub
996.356991] usb 1-6: firmware: requesting zd1211/zd1211_uphr
996.456016] zd1211rw 1-6:1.0: firmware version 4605
996.496135] zd1211rw 1-6:1.0: zd1211 chip 6891:a727 v4330 high 00-0f-cb RF2959_RF pa0 g----
996.498835] cfg80211: Calling CRDA for country: US
996.521798] ADDRCONF(NETDEV_UP): wlan0: link is not ready
1923.399401] r8169: eth0: link down

Many thanks in advance … Paul

FIXED
Checked router/ access point was configured to a different time zone from my PC. Once this was corrected and PC and AP time zones matched, was able to associate with AP no problem. Strange though that Windows does not seem to care about this. I’ve had occasions in the past where a Linux machine simply would not associate with an AP for no apparent reason. Perhaps this problem is not uncommon, but I found very few references anywhere.
… Paul