[CentOS] wpa_supplicant and machine freezes

Hi Folks,

I'd like to install my USB-WLAN-Stick Netgear WG111v3.
Ndiswrapper works correct after installing Kernel-Modules from atrpm

ndiswrapper-kmdl-2.6.18-53.1.19.el5.centos.plus-1.52-16.el5.i686.rpm.

But by calling wpa_supplicant  with

wpa_supplicant -i wlan0 -D wext -c /etc/wpa_supplicant/wpa_supplicant.conf -d

machine freezes.

My wpa_supplicant.conf:

ctrl_interface=/var/run/wpa_supplicant
eapol_version=1
ap_scan=1
network={
        ssid="MyNet"
        scan_ssid=1
        proto=WPA
        key_mgmt=WPA-PSK
        pairwise=TKIP
        group=TKIP
        #psk="MyPSK"
        psk=9050ec6fe020b1738fce16c93c33b3809b9e62d5e6bf955518076eb2d7263
}

With this configuration it works correct with Sidux (a debian clone).

But with CentOS 5.1 ....???

No hints in /var/log/messages or dmesg available.

Has somebody an advice/ a solution for me?
More information needed?

Thx
Timothy