strange wlan behaviour - ideneb 1.6 (10.5.8)

after installing ideneb distro there is a strange effect concerning airport.
during setup no patch was installed for wireless.
after bootup airport was detected and seemed to work properly, but
no network will be detected; no connection to a SSID specified network (timed out)
i was wondering that creating a network will function(!?)
tried a new setup with broadcom patch - the same issue/problem
also tried the broadcom_enabler_script (0.5.2) - no success
in former times airport works well under 10.4.8 and 10.5.2
does anyone have an idea how to fix this?
many thnx.

gtx
sniper

EDIT:
does anyone know whether a "dell truemobile 1450 - bcm4309 minipci" adapter work with leopard >10.5.2 or not?

here are my system specs:
intel p4/3ghz sse2
msi ms-7048 oem
1gb dual channel ram
via rhine III ethernet on-board
ac97/ich5 sound on-board (realtek 8086/24d5)
dell minipci truemobile 1450 (bcm4309) 14e4/4324
nvidia gforce 6200 agp, 512mb
250gb ata100 hd, 7200rpm (mac os) primary slave
200gb ata100 hd, 7200rpm (win) primary master
sony ide dvd-rom
pioneer ide dvd-rw