UserParameter not working

[knarfling]

I am having some difficulty with a UserParameter.

my configuration looks like this

UserParameter=sem.num,/usr/bin/ipcs|grep apache|wc -l

When I do zabbix_agentd -t sem.num I get
sem.num [t|7]

However, on the server side when I do zabbix_get -s 192.168.yyy.zzz -k sem.num it always returns 0

On the web I configured it as a zabbix agent using various data types. None of them seem to work. If I change it to an active zabbix agent, it becomes unsupported. When I change back the log shows

Parameter [sem.num] became supported by agent on host

but it still returns a 0 instead of the correct number.

Any idea what I am doing wrong? It only takes .006 seconds for the command, so I do not believe it is a timeout error.

I am currently using zabbix 1.1.5 on both the server and the agent under Red Hat Linux.

Thanx for any help.

[den_crane]

# ipcs|grep www|wc -l
2

# su zabbix
> ipcs|grep www|wc -l
0