I Have a problem with my Router Cisco and Firewall Netscreen, I dont Know if i may configurating an IP Public in my firewall? or the IP Public in my router is succeded....

Hi, I have an access server 2509 (1 Interface Eth0, 2 Serials).When the router booting appears the follow message: %Error: System Flash bank 0 unknow, chip id 0xFFFF (Reserved = 0xFFFF)%Error: system flash initialization Failed.and i can´t do anyth...