tftp will not start.

I have setup nimol on a Fedora 9 machine. Nimol is installed and correctly configured and I have a client rs6000 (43p) declared in the dhcpd.conf file. all is running correctly and tftp is installed. I am monitoring /var/log/messages when I start the 43p and see the dhcp request come in and a reply with the correct address and subnet mask given as the reply. However tftp does not start and the 43p goes to SMS. Anyone know why tftp does not start please?