Monitoring Performance Counters of Lotus Domino

[hcosta]

People,

I added this performance counter to my zabbix_agentd.conf to monitore dead mails of Lotus Domino

perfcounter = maildead "\Lotus Notes(MAIL.Dead)\Notes Statistics",30

But when I give a check-config command I got this error:

invalid performance counter especification

What is wrong?

Thanks in advance...