FBSD-5.3-Beta4 / Project Evil core dumps

Hi all,

I've got a major problem with my wireless networkcard. It's has a Ralink 
2500 chipset (http://www.ralinktech.com/supp-1.htm)
chipset. Using Project Evil I got the Windows XP drivers working with 
the kernel.

However mostly when the interface goes (down/) up, the core dumps and 
the server is rebooted. Offcourse I have searched at the usual places 
but found no solutions so far...

Any help would greatly appreciated!

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defiant.unix-asp.com 5.3-BETA4 FreeBSD 5.3-BETA4 #1: Fri Sep 17 18:00:42 
CEST 2004     root_at_defiant.unix-asp.com:/usr/obj/usr/src/sys/GENERIC  i386

ndis0: <802.11g PCI Wireless Network Adapter> mem 0xc6efe000-0xc6efffff 
irq 11 at device 9.0 on pci1
ndis0: NDIS API version: 5.0
ndis0: Ethernet address: 00:0c:76:ca:fe:07
ndis0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
ndis0: 11g rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps

defiant# ifconfig ndis0
ndis0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 192.168.1.2 netmask 0xffffff00 broadcast 192.168.1.255
        inet6 fe80::20c:76ff:feca:fe07%ndis0 prefixlen 64 scopeid 0x7
        ether 00:0c:76:ca:fe:07
        media: IEEE 802.11 Wireless Ethernet autoselect
        status: associated
        ssid linksys 1:linksys
        channel 11 authmode OPEN powersavemode OFF powersavesleep 100
        rtsthreshold 2312 protmode CTS
        wepmode OFF weptxkey 1

defiant# wicontrol ndis0 -l
1 station:
ap[0]:
        netname (SSID):                 [ linksys ]
        BSSID:                          [ 00:0f:66:51:5a:52 ]
        Channel:                        [ 11 ]
        Quality/Signal/Noise [signal]:  [ 125 / 125 / 0 ]
                                [dBm]:  [ 125 / -24 / -149 ]
        BSS Beacon Interval [msec]:     [ 0 ]
        Capinfo:                        [ ]