I get an error message whenever i download an update and it tries to install

Question

For the last month on my macbook pro i have downloaded the softwart updates successfully, but about 3 mins into installing i get an error message that they were unable to be installed (error message)
this is the last error message in my library receits folder:
30/04/11 9:25:35 PM    airportd[20]    [most time: (1.021038) _scan] trace: <CFArray 0x1005015d0 [0x7fff70169f20]>{type = mutable-small, count = 6, values = (
    0 : <CFString 0x10003acb0 [0x7fff70169f20]>{contents = "pref_netwk_AJ"}
    1 : <CFString 0x10003acf0 [0x7fff70169f20]>{contents = "1_pref_netwk"}
    2 : <CFString 0x100501220 [0x7fff70169f20]>{contents = "(1.021038) _scan"}
    3 : <CFString 0x10050b6f0 [0x7fff70169f20]>{contents = "(0.000010) _lookup"}
    4 : <CFString 0x100510170 [0x7fff70169f20]>{contents = "(0.021015) _keychain"}
    5 : <CFString 0x100507b10 [0x7fff70169f20]>{contents = "(0.844108) _association"}
com.apple.message.domain: com.apple.airport.autojoin.summary
com.apple.message.signature: AutoJoinSuccess
com.apple.message.result: success
com.apple.message.value: 1.904088
com.apple.message.value2: 1.000000
com.apple.message.value3: 1.000000
com.apple.message.uuid: 9E686503-A026-47AA-A26C-695AAA432F87

Answer 1

I am also having this same problem. I have updated my computer. I have downloaded the complete brother driver package from Apple as well as the drivers from Brother. As far as I can tell, all have been installed successfully. It is only when I try to ADD the printer do I get that message. Both my roomate and I have Macbook Airs so we cant use the disk which came with the printer. This is irrelivant anyway as the drivers have been successfully downloaded and installed. SO FRUSTRATING!!!!!