[cobbler] kernel/nic problems?

I have a cobbler server running openSUSE 12.1 that will deploy openSUSE 12.1. Currently systems get dhcp then pxe boot via tftp and fail to find the install repo. At that point I can manually specify where the repo is (http://192.168.100.1/cblr/links/openSUSE121-x86_64) and I'm told that there is no interface, and that the kernel may not support my nic. Has anyone been through something like this? -- Michael