Printing Slow

I have a nt 4.0 domain using dhcp
I changen the dhcp range and asigned static IP address to the printer. My printers all are hp with jetdirect cards (4si,5si,8100,etc)
After I change the dhcp range my printer are printing very slow or printing incompleted pages.
WHAT I AM MISSING? WHY THE STATIC IP IS MAKING THE PRINTERS SLOW?

THANKS TO ANY BODY THAT COULD HELP ME