Kernel-2.6.18-r5 is unable to generate lp.ko. It is impossible to print to a parrallel port printer, whether it's controled by a module (lp.ko is NOT created) or from inside the kernel. .config is a copy of the one I used for gentoo-source-2.6.18-r3 where it worked OK.
Don't restrict bugs without any reason; just leave the checkboxes alone if you have no clue.
Attach the kernel .config here