unable to kill process, problem with FBSD6?

[peceka]

Hi.

I've got strange problem. I've setup pound on my FBSD6 box and
sometimes it (pound) stops. Normally it should exit but it doesn't -
it hangs.

# ps auwx | grep pound
pound   46868  0.0  1.0 55428 21932  ??  SE    1:58PM   0:31.34
/usr/local/sbin/pound -f /usr/local/etc/pound.cfg

S: Marks a process that is sleeping for less than about 20 seconds.
E: The process is trying to exit.

It dies after 30 minutes.

This problem doesn't exists on Linux.

This behaviour is very irregular.
Why FBSD doesn't kill this process?

Regards,
p.