configuration

[capacity77 at tin.it]

Hi there!
I have some problem configuring hostap!
First: when I insert the card, two interfaces get loaded:

wifi0     Link encap:UNSPEC  HWaddr 00-50-8B-99-B7-FF-00-00-00-00-00-00-00-00-00-00
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:188 (188.0 b)  TX bytes:1824 (1.7 KiB)
          Interrupt:5 Base address:0x100

wlan0     Link encap:Ethernet  HWaddr 00:50:8B:99:B7:FF
          UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:1824 (1.7 KiB)
          Interrupt:5 Base address:0x100

they seem the same interface but the wifi0 has a strange HWaddr, that's
the same of wlan0 but with many 00-00 in the end.

Second: other machines see me as an AP but can't receive an IP from my dhcp
server!
Is there a configuration you can advice me, or is there any good howto,
a simple to use one?

thanks for your help
Dom