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Generated config file in /tftpboot/pxelinux.cfg is wrong.
Generated config file
DEFAULT LinuxMCE LABEL LinuxMCE LOCALBOOT 0 #ERNEL 44/vmlinuz APPEND root=/dev/nfs boot=nfs nfsroot=192.168.80.1:/usr/pluto/diskless/44 splash
Corrected config file
DEFAULT LinuxMCE LABEL LinuxMCE LOCALBOOT 0 KERNEL 44/vmlinuz APPEND root=/dev/nfs boot=nfs nfsroot=192.168.80.1:/usr/pluto/diskless/44 splash