[monit] Can't restart monit

[Nicola Tiling]

Hi

For some time past I can't restart monit (only) on one of my machines  
(FreeBSD 6.4 x64, previously 6.2)

/usr/local/etc/rc.d/monit restart
Performing sanity check on monit configuration:
Control file syntax OK
Stopping monit.
Waiting for PIDS: 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378, 93378,  
93378, 93378,
 .... and so on

Only "kill -9"  stops the process. How can I figure out the reason ?

Nicola