Suse 9.1 Network driver problem

List, I have installed Suse 9.1 on HP system. The system is having Brodcom Gigabyte Ethernet card. The installation went fine with out any error. The problem I am facing is that the LAN driver are not getting loaded while system booting process. I have to run YAST to activate LAN driver & then only it works. Dose any one tell me why it could be? Quick response is highly appreciated. Regards, Milind