Unable to join open WEP wireless network

[Chen, Xianwen (陈贤文) <xianwen.chen%gmail.com@localhost>]

Dear NetBSD users,

I am having trouble connecting NetBSD to an open WEP wireless network,
called "ks-guest". Because my Android mobile phone is able to connect
to "ks-guest", the network is functioning.

"ifconfig iwi0 list scan" gives the following output:
SSID                              BSSID              CHAN RATE  S:N     INT CAPS
ks-nett                           24:01:c7:14:2a:60    1   54M  37:0
 102 EPS  RSN WME
ks-guest                          10:bd:18:f0:26:f2    1   54M  69:0
 102 ES   WME
ks-mobil                          10:bd:18:f0:26:f1    1   54M  69:0
 102 EPS  RSN WME
ks-mobil                          24:01:c7:14:2a:61    1   54M  36:0
 102 EPS  RSN WME
ks-guest                          24:01:c7:14:2d:d2    6   54M  55:0
 102 ES   WME
ks-guest                          24:01:c7:14:27:32    6   54M  49:0
 102 ES   WME
GSS-KS                            30:b5:c2:3e:7b:d8   11   54M  51:0
 100 EPS  RSN WME
ks-nett                           cc:d5:39:cc:61:a0   11   54M  52:0
 102 EPS  RSN WME
ks-guest                          cc:d5:39:cc:61:a2   11   54M  53:0
 102 ES   WME
ks-mobil                          cc:d5:39:cc:61:a1   11   54M  54:0
 102 EPS  RSN WME
KSA-Trakteriet                    cc:d5:39:cc:61:a3   11   54M  50:0
 102 EPS  RSN WME

I try to connect to "ks-guest" by "ifconfig iwi0 ssid ks-guest
-nwkey". When I run "ifconfig", the ssid is updated. However, the
status remains "no network":
iwi0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        ssid ks-guest
        powersave off
        bssid 10:bd:18:f0:26:f0
        address: 00:12:f0:f2:14:c4
        media: IEEE802.11 autoselect
        status: no network
        inet6 fe80::212:f0ff:fef2:14c4%iwi0 prefixlen 64 detached scopeid 0x3

I tried to specify bssid and channel by for example "ifconfig -s iwi0
ssid ks-guest bssid 24:01:c7:14:2b:e2 chan 6 -nwke". However, the
status does not change.

What can I try to connect to the network?

Sincerely,
Xianwen