problems with prelude plugin for snort on nanobsd

Hi,

Im having some problems getting the prelude library working for snort.  
Snort have been  successfully compiled with prelude  and i have the  
setup working on another box (virtual machine), but when i try the 
excact same setup om på nanobsd it dont work. The only difference  as i 
see it is that on my nanobsd /var is a memory file system:

# mount
/dev/ad1s1a on / (ufs, local, read-only)
devfs on /dev (devfs, local)
/dev/md0 on /etc (ufs, local)
/dev/md1 on /var (ufs, local)

It seems like  prelude is complaining  about  a lock file - but i cant 
seem to find the problem.
Any ideas?

The errors from snort/prelude: (with LIBPRELUDE_DEBUG=10)

Rule application order: activation->dynamic->pass->drop->alert->log
Log directory = /var/log/snort
Verifying Preprocessor Configurations!
0 out of 512 flowbits in use.
Decoding LoopBack on interface NULL
14 Oct 12:36:13 (process:3631) DEBUG: [init] thread used=1 
(prelude-thread.c:335 _prelude_thread_in_use)
14 Oct 12:36:13 (process:3631) DEBUG: Using configuration file: 
/usr/local/etc/prelude/profile/snort/config. (prelude-option.c:261 
process_cfg_file)
14 Oct 12:36:13 (process:3631) DEBUG: Using configuration file: 
/usr/local/etc/prelude/default/global.conf. (prelude-option.c:261 
process_cfg_file)
14 Oct 12:36:13 (process:3631) DEBUG: [queue=0xbfbfe1ec] prelude() 
(prelude-option.c:329 call_option_cb)
14 Oct 12:36:13 (process:3631) DEBUG: Using configuration file: 
/usr/local/etc/prelude/default/client.conf. (prelude-option.c:261 
process_cfg_file)
14 Oct 12:36:13 (process:3631) DEBUG: [queue=0xbfbfe1ec] prelude() 
(prelude-option.c:329 call_option_cb)
14 Oct 12:36:13 (process:3631) DEBUG: [queue=0x288f7490] 
server-addr(10.0.0.10) (prelude-option.c:329 call_option_cb)
14 Oct 12:36:13 (process:3631) DEBUG: prelude() context=0x286490e0 
default=0x286490e0 (prelude-option.c:385 call_option_from_cb_list)
14 Oct 12:36:13 (process:3631) DEBUG: prelude() context=0x286490e0 
default=0x286490e0 (prelude-option.c:385 call_option_from_cb_list)
14 Oct 12:36:13 (process:3631) DEBUG: server-addr(10.0.0.10) 
context=0x286490e0 default=0x286490e0 (prelude-option.c:385 
call_option_from_cb_list)
14 Oct 12:36:13 (process:3631) DEBUG: woke up 0 timer 
(prelude-timer.c:149 walk_and_wake_up_timer)
ERROR: prelude-failover: Unable to initialize prelude client: error 
locking '/var/spool/prelude/snort/global/data0': Invalid argument.
Fatal Error, Quitting..

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