Gateway / netmask

I am seting up a network with a linux server and have been informed that the following netmask and gateway numbers are incompatable with each other, now i am a little confused about what i should change the last section of the gateway # to in order to make the network work better. Current Gateway: 192.168.1.255 Current Netmask: 255.255.255.0 any advice will be apreceated. FadMart - http://www.fadmart.com - An Associate of the World's Largest Store!