Matthe hedrick - 2012-10-18

So i am new to webmin on linux , i host a dedicated server that has 4 seperate ips. we will say through 4
the main ip is set on 1 but when i try to make a server and point it to 2 it does not work, it says that port is binded, so i searched through the network config in webmin and see that the only ip active is  1 the other 3 ips arent there. how would i add these 3 ips to become active on the server?
Thank you