Macbook ver 10.6.8 after update 10.6.8 combo cannot join open wifi anymore

Question

I am using Macbook ver 10.6.8 after update 10.6.8 combo i cannot join open wifi anymore.it shows me no internet connection.in fact before this i can acces any open wifi smoothly.it makes me annoyed and regret my action updating the combo.almost 3weeks i try to find the solution by read any suggestion from community but it makes me frustrated. for sure i refuse to send away my macbook to technician because what i knew they also take solution from here.i state here my macbook details :
Model Name:          MacBook
  Model Identifier:          MacBook3,1
  Processor Name:          Intel Core 2 Duo
  Processor Speed:          2.2 GHz
  Number Of Processors:          1
  Total Number Of Cores:          2
  L2 Cache:          4 MB
  Memory:          4 GB
  Bus Speed:          800 MHz
  Boot ROM Version:          MB31.008E.B02
  SMC Version (system):          1.24f3
  Serial Number (system):          W8744400Z63
  Hardware UUID:          6172E4C5-C120-5C8A-9B2E-430B3D42C912
  Sudden Motion Sensor:
  State:          Enabled
this the details my current network:
AirPort:
  Type:          AirPort
  Hardware:          AirPort
  BSD Device Name:          en1
  IPv4 Addresses:          169.254.70.222
  IPv4:
  Addresses:          169.254.70.222
  Configuration Method:          DHCP
  Interface Name:          en1
  Subnet Masks:          255.255.0.0
  IPv6:
  Configuration Method:          Automatic
  Ethernet:
  MAC Address:          00:1d:4f:fc:c2:34
  Media Options:
  Media Subtype:          Auto Select
  Proxies:
  Exceptions List:          *.local, 169.254/16
  FTP Passive Mode:          Yes
  Service Order:          2
this is the open wifi i always acces smoothly before i update the combo:
  Software Versions:
  Menu Extra:          6.2.2 (622.2)
  configd plug-in:          6.2.5 (625.6)
  System Profiler:          6.0.1 (601.1)
  Network Preference:          6.2.2 (622.2)
  AirPort Utility:          5.6.1 (561.3)
  IO80211 Family:          3.2 (320.1)
  Interfaces:
en1:
  Card Type:          AirPort Extreme  (0x14E4, 0x88)
  Firmware Version:          Broadcom BCM43xx 1.0 (5.10.131.42.4)
  Locale:          APAC
  Country Code:          MY
  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, 149, 153, 157, 161, 165
  Wake On Wireless:          Supported
  Status:          Connected
  Current Network Information:
TM WiFi:
  PHY Mode:          802.11g
  BSSID:          0:19:be:80:20:1a
  Channel:          1
  Country Code:          MY
  Network Type:          Infrastructure
  Security:          None
  Signal / Noise:          -77 dBm / -94 dBm
  Transmit Rate:          36
  Other Local Wireless Networks:
TM WiFi:
  PHY Mode:          802.11g
  BSSID:          0:19:be:80:21:96
  Channel:          6
  Network Type:          Infrastructure
  Security:          None
  Signal / Noise:          -78 dBm / -99 dBm
Location (8/1/12 8:22 AM):<<<<<<<<<-------------------------At this time i can acces this open wifi with auto-login
  Active Location:          No
  Services:
Ethernet:
  Type:          Ethernet
  BSD Device Name:          en0
  Hardware (MAC) Address:          00:1b:63:a6:2e:44
  IPv4:
  Configuration Method:          DHCP
  IPv6:
  Configuration Method:          Automatic
  Proxies:
  Exceptions List:          *.local, 169.254/16
  FTP Passive Mode:          Yes
FireWire:
  Type:          FireWire
  BSD Device Name:          fw0
  Hardware (MAC) Address:          00:1d:4f:ff:fe:72:00:d4
  IPv4:
  Configuration Method:          DHCP
  IPv6:
  Configuration Method:          Automatic
  Proxies:
  Exceptions List:          *.local, 169.254/16
  FTP Passive Mode:          Yes
AirPort:
  Type:          IEEE80211
  BSD Device Name:          en1
  Hardware (MAC) Address:          00:1d:4f:fc:c2:34
  IPv4:
  Configuration Method:          DHCP
  IPv6:
  Configuration Method:          Automatic
  DNS:
  Search Domains:          , 94C723E0-B495-45CF-8ACE-279AF0F2D687
  Server Addresses:
  Proxies:
  Exceptions List:          *.local, 169.254/16
  FTP Passive Mode:          Yes
  IEEE80211:
  Join Mode:          Automatic
  JoinModeFallback:          Prompt
  PreferredNetworks:
  SecurityType:          Open
  SSID_STR:          TM WiFi
  Unique Network ID:          94C723E0-B495-45CF-8ACE-279AF0F2D687
after i update the combo:
and the page which the open wifi load automatically did not appear as before.
if the update affect the wifi,cant i just downgrade and remove the annoyed combo?any expertise r welcome to give great solution..plzz!!!need your help!!!!

Answer 1

cant believe it nobody reply.. very dissapointed ..i bring my mac to experrt and he reset my mac to the original version 10.6.8 .. n seriously after it done.. the connection as i mentioned which annoyed me settled and it works like a charm.. when i try to check update my software ...it showned combined software for 10.6.8.. however i still afraid to update it.. i'm still in trauma...