There is no 10.4. It is 10.04 because it came out in April, the fourth
month. Using your system, 10.10 which comes out next October would have a
LOWER number than 10.4 which does not make sense.

If you want help re: wireless then you should include some info about what
wireless card or chip you have installed and the make and model of your
computer. That way we aren't whistling in the wind.