kernel oops

Hi all,
just started up with enbd and fr1, great work.
However have got some problems. My config looks like that:
SuSE 9.3 patched kernel (2.6.11.4-21.7-default) using enbd 2.4.32
(fr1 fr1-2.17).
modinfo:
filename:       /lib/modules/2.6.11.4-21.7-default/kernel/drivers/block/enbd/enbd.ko
author:         Peter T. Breuer, Andres Marin
description:    Enhanced Network Block Device 2.4.30 $Date: 2002/09/17 16:33:22 $
license:        GPL
vermagic:       2.6.11.4-21.7-default 586 REGPARM gcc-3.3
depends:
srcversion:     8A3113F48C5431C68CC84DB
parm:           req_timeo:int
parm:           md5_off_threshold:int
parm:           md5_on_threshold:int
parm:           md5sum:int
parm:           major:int
parm:           buffer_writes:int
parm:           direct:int
parm:           show_errs:int
parm:           buf_sectors:int
parm:           merge_requests:int
parm:           sync:int
parm:           rahead:int

oops:
Unable to handle kernel NULL pointer dereference at virtual address 00000004
 printing eip:
c0152928
*pde = 00000000
Oops: 0000 [#1]
Modules linked in: nfsd enbd_ioctl enbd raid1 bitmap af_packet subfs joydev sg st sr_mod nvram thermal processor edd fan button battery ac ipv6 xfs exportfs ext3 jbd evdev parport_pc lp parport tg3 reiserfs ide_cd cdrom ide_disk dm_mod cciss serverworks ide_core sd_mod scsi_mod
CPU:    0
EIP:    0060:[]    Tainted: G     U VLI
EFLAGS: 00010202   (2.6.11.4-21.7-default)
EIP is at invalidate_bdev+0x8/0x20
eax: 00000000   ebx: 00000000   ecx: f6af9f30   edx: 00000000
esi: 00000000   edi: 00000000   ebp: b7dcd000   esp: f6af9f14
ds: 007b   es: 007b   ss: 0068
Process bash (pid: 6848, threadinfo=f6af8000 task=f76e8020)
Stack: 00000000 c0167836 00000000 f94997a0 f9498080 f948a915 f949099e f94997a0
       f949076b 00000cd8 0000000f f949046f f9498080 00000001 b7dcd000 f9490118
       00000000 f7054000 00000001 00000000 0000000a f948ff00 da0fa280 b7dcd000
Call Trace:
 [] __invalidate_device+0x36/0x50
 [] enbd_soft_reset+0x95/0x100 [enbd]
 [] enbd_write_proc+0x218/0x240 [enbd]
 [] enbd_write_proc+0x0/0x240 [enbd]
 [] proc_file_write+0x29/0x40
 [] proc_file_write+0x0/0x40
 [] vfs_write+0x93/0x110
 [] sys_write+0x3c/0x70
 [] sysenter_past_esp+0x52/0x79
Code: 24 10 ff 43 0c eb e2 0f 0b ba 01 08 d2 2e c0 e9 4e ff ff ff eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 90 53 89 c3 e8 08 0c 00 00  43 04 5b 8b 80 9c 00 00 00 e9 89 be fe ff 89 f6 8d bc 27 00

are there any solutions ?

regards Uwe