OpenBSD install problem

While trying to install OpenBSD i get a system crash after selecting the media for my network.
THe Install is a cd ISO i made and i have tried 2 different NICs as wel las selected all aval media. after selecting the media it will just sit there not doing anythign and the only way out is a reboot it will install fine if i skip the network configuration but that just will not do as it is estinal that bis machine ba able to get out . why does it hang like this ? is there any way arround it?