I'm having trouble getting Zenworks 6.5 PXE imaging to work.

The documentation states:

After the Desktop Management Preboot Services components are installed, the
following services should be installed and running on the server:

* pmap.nlm
* tftp.nlm
* pdhcp.nlm
* dts.nlm

When I type in pxestart, all of the above loads. However, the logger screen

PMAP: Cluster IP address not set, using local address.
PMAP: UDP port 111 is already in use.
PMAP: Exiting...

All this server does is run Zenworks components, so I'm not sure what else
could already be using UDP 111? Any thoughts?