No IP Address in WLAN

I have just installed 6.10. I have installed a DWLG510 (rev B) WLAN card. After initial installation I used the Synapticantec package installer to install "linux-resticted-modules-2.6.17-10-386 [I have a Compaq deskpro, Pentium II, 330 Mhz]. This allowed my WLAN card to be discovered am\nd I configured it to work to a WLAN router.

The WLAN card appearsconnected to the AP however it will not pick up an IP address, using DHCP. When I configured the IP address manually, I am unable to ping the gateway.

Here is the output from the iwconfig and ifconfig [DHCP enabled]

User@PC:~$ iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

wifi0 no wireless extensions.

ath0 IEEE 802.11g ESSID:"true_homewifi"
          Mode:Managed Frequency:2.437 GHz Access Point: 00:04:ED:57:7F:9C
          Bit Rate:24 Mb/s Tx-Power:18 dBm Sensitivity=0/3
          Retry:off RTS thr:off Fragment thr:off
          Power Management:off
          Link Quality=17/94 Signal level=-78 dBm Noise level=-95 dBm
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

sit0 no wireless extensions.

User@PC:~$ ifconfig
ath0 Link encap:Ethernet HWaddr 00:13:46:8C:30:FA
          inet6 addr: fe80::213:46ff:fe8c:30fa/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:80 errors:0 dropped:0 overruns:0 frame:0
          TX packets:96 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:7980 (7.7 KiB) TX bytes:9660 (9.4 KiB)

lo Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:403 errors:0 dropped:0 overruns:0 frame:0
          TX packets:403 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:22468 (21.9 KiB) TX bytes:22468 (21.9 KiB)

wifi0 Link encap:UNSPEC HWaddr 00-13-46-8C-30-FA-00-00-00-00-00-00-00-00-00-00
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:10048 errors:0 dropped:0 overruns:0 frame:653
          TX packets:248 errors:4 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:199
          RX bytes:840025 (820.3 KiB) TX bytes:19597 (19.1 KiB)
          Interrupt:11 Memory:cc8c0000-cc8d0000

Questions.

I think something basic is wrong....I know very little about this....what have I missed?

What is the wifi0 interface?

I have also installed Network Manager and Network Manager-Gnome, however now that it is installed where do I find it to start it running. There is no icon apparent on the desk top.