Ubuntu Lucid 64-bit packages give "pidfile /var/run/opendnssec/enforcerd.pid already exists"

Created two VMs: one Ubuntu 10.04 Server 32 bit, and another one 64 bit.
Then crated /etc/apt/sources.list.d/ods.list with this contents:

deb http://ppa.launchpad.net/pkg-opendnssec/ppa/ubuntu lucid main
deb-src http://ppa.launchpad.net/pkg-opendnssec/ppa/ubuntu lucid main

apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 7C1A977926535DB3
apt-get install opendnssec

ods-control start

64 bit VM gives error:

Mar 1 12:10:24 lucid64 ods-enforcerd: opendnssec starting...
Mar 1 12:10:24 lucid64 ods-enforcerd: opendnssec Parent exiting...
Mar 1 12:10:24 lucid64 ods-enforcerd: opendnssec forked OK...
Mar 1 12:10:24 lucid64 ods-enforcerd: pidfile /var/run/opendnssec/enforcerd.pid already exists. If no ods-enforcerd process is running, a previous instance didn't shutdown cleanly, please remove this file and try again.

32 bit VM does not:

Mar 1 12:10:53 lucid32 ods-enforcerd: opendnssec starting...
Mar 1 12:10:53 lucid32 ods-enforcerd: opendnssec Parent exiting...
Mar 1 12:10:53 lucid32 ods-enforcerd: opendnssec forked OK...
Mar 1 12:10:53 lucid32 ods-enforcerd: opendnssec started (version 1.3.6), pid 2585