Can't connect via Airport

Question

Hey Guys,
I'm running;
Model Name: MacBook
Model Identifier: MacBook2,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.16 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 1 GB
Bus Speed: 667 MHz
Boot ROM Version: MB21.00A5.B07
SMC Version (system): 1.17f0
Serial Number (system): W87347UFZ5W
Hardware UUID: 00000000-0000-1000-8000-0019E3495D87
Sudden Motion Sensor:
State: Enabled.
I had no problem connecting to Wifi at both home and uni in the UK using Airport, but now I'm at uni in HK I can't get it to work. When I came over here I had 10.4 but it was problematic at the best of times. I upgraded to 10.6.4 and since then I've not been able to connect at all. However, using the same login details I can connect fine through ethernet on my macbook and using wifi via my iphone.
When using Airport, I get a range of error messages, but sometimes I am able to connect to the network only only to get a 'Self-Assigned IP' error. I'm going round in circles with this, I've tried deleting all the entries in Keychain Access and have trashed both com.apple.airport.preferences.plist and preferences.plist and restarting. My settings are;
AirPort:
Type: AirPort
Hardware: AirPort
BSD Device Name: en1
IPv4 Addresses: 169.254.32.34
IPv4:
Addresses: 169.254.32.34
Configuration Method: DHCP
Interface Name: en1
Subnet Masks: 255.255.0.0
IPv6:
Configuration Method: Automatic
Ethernet:
MAC Address: 00:1c:b3:b8:fe:48
Media Options:
Media Subtype: Auto Select
Proxies:
Exceptions List: *.local, 169.254/16
FTP Passive Mode: Yes
Service Order: 0
Ethernet:
Type: Ethernet
Hardware: Ethernet
BSD Device Name: en0
IPv4 Addresses: 143.89.216.131
IPv4:
Addresses: 143.89.216.131
Configuration Method: DHCP
Interface Name: en0
Network Signature: IPv4.Router=143.89.219.254;IPv4.RouterHardwareAddress=00:00:0c:07:ac:1b
Router: 143.89.219.254
Subnet Masks: 255.255.252.0
IPv6:
Configuration Method: Automatic
DNS:
Domain Name: resnet.ust.hk
Server Addresses: 143.89.14.153, 143.89.14.7
DHCP Server Responses:
Domain Name: resnet.ust.hk
Domain Name Servers: 143.89.14.153,143.89.14.7
Lease Duration (seconds): 0
DHCP Message Type: 0x05
Routers: 143.89.219.254
Server Identifier: 143.89.14.153
Subnet Mask: 255.255.252.0
Ethernet:
MAC Address: 00:19:e3:49:5d:87
Media Options: Full Duplex, Flow Control
Media Subtype: 100baseTX
Proxies:
Exceptions List: *.local, 169.254/16
FTP Passive Mode: Yes
Service Order: 1
Software Versions:
Menu Extra: 6.2.1 (621.1)
configd plug-in: 6.2.3 (623.1)
System Profiler: 6.0 (600.9)
Network Preference: 6.2.1 (621.1)
AirPort Utility: 5.5.1 (551.19)
IO80211 Family: 3.1.1 (311.1)
Interfaces:
en1:
Card Type: AirPort Extreme (0x168C, 0x87)
Firmware Version: Atheros 5416: 2.0.19.10
Locale: ETSI
Country Code:
Supported PHY Modes: 802.11 a/b/g/n
Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
Status: Not Associated
Local Wireless Networks:
sMobileNet:
PHY Mode: 802.11n
BSSID: 0:1d:70:93:1f:e1
Channel: 1
Network Type: Infrastructure
Security: WPA2 Enterprise
Signal / Noise: -65 dBm / -96 dBm
sMobileNet:
PHY Mode: 802.11n
BSSID: 0:1d:70:93:1f:ee
Channel: 64,-1
Network Type: Infrastructure
Security: WPA2 Enterprise
Signal / Noise: -71 dBm / -96 dBm
sMobileNet:
PHY Mode: 802.11n
BSSID: 0:1d:70:93:1b:51
Channel: 6
Network Type: Infrastructure
Security: WPA2 Enterprise
Signal / Noise: -42 dBm / -96 dBm
Any ideas? Many thanks for any help in advance.
James

Answer 1

What is the type of wireless network are you connecting to? Is it a, b, g or n or a combination of any of the two? Is there any security on the wireless network?
Now in System Preferences->Network pane highlight the Airport card. Then at the top of the pane select the 'Location' drop-down and select "Edit Locations" and create a new custom Location calling it what you want. Then in the right hand of the pane hit the 'Apply' button and this will save the new Location you made. Then while still in the Network pane try to connect to your wireless network. See if this help, Good luck.