I get this error when i pxe boot my client machins and try to image them

bad or missing file \net\protman.dos
bad or missing file \net.dis_pkt.dos
what does this mean and how do i correct this

I am using ghost 11, when i get to the ghost screen ghostcast is greyed out
I have not idea where to go from here

the client machines are dell latitude |e6400 atg
network card is 82567LM

I have downloaded drive after drive and still cant get this to work as it should I need some help please assist...