help!

i have a panic problem with my alpha. i use it strickly for ipnat.
this seems to have started just after i configured and started
to use the ftp portion of ipnat.conf. macine causing the panic is a
sparc-10 running solaris-7 trying to ftp.
anyone with an idea of what  the problem could be?
i've included the panic,h/w conf and ipnat.conf

thanks! (ps - i love netbsd/alpha, perfect gateway for my @home cable
modem!)

...john schenck...

uname -a

> NetBSD kea.home.com 1.3F NetBSD 1.3F (GENERIC) #1: Tue Jun 30 1
> 6:58:17 PDT 1998
>
here is the panic:

> fatal kernel trap:
>
>     trap entry = 0x2 (memory management fault)
>     a0         = 0x44
>     a1         = 0x1
>     a2         = 0x0
>     pc         = 0xfffffc00003d82f8
>     ra          = 0xfffffc00003d82c
>    curproc    = 0x0
>
> panic: trap
> syncing disks... done
>
> dumping to dev 8,1 offset 225327
>

here is my ipnat.conf


> # de0 is the external interface
> map de0 192.168.250.0/24 -> 24.3.200.1/32 proxy port ftp ftp/tcp
> map de0 192.168.250.0/24 -> 24.3.200.1/32 portmap tcp/udp 37000:49000
> map de0 192.168.250.0/24 -> 24.3.200.1/32
>

here is my hardware: (all digial h/w ! :-)

> Testing Memory from 8 to 64 meg...
> Executing power-up script...
> version                 BL5 V3.8-3 Aug 10 1995 03:22:55
>
> dka300.3.0.6.0             DKA300                     DSP3160S  436A
> dva0.0.0.0.1               DVA0
> ewa0.0.0.8.0               EWA0              08-00-2B-E4-60-4A
> ewb0.0.0.12.0              EWB0              08-00-2B-E5-A0-D4
> pka0.7.0.6.0               PKA0                  SCSI Bus ID 7
>
> 64 Meg of system memory
>
> CPU speed is 166 MHZ
> Cache size is 256 Kbytes
>
> *** keyboard not plugged in...
> Keyboard error; using serial port terminal
> >>>boot dka300
>