How to change the Main IP in a Dedicated Server?

My situation is this: I have a Dedicated server with many IPs. 111.111.111.111 and 222.222.222.222 for eg. And My default gateway is 111.111.111.254.
But when i retrieve data from the internet ,the ip shows 111.111.111.111. The question is How can i change the Main ip to "222.222.222.222" as the IP is not in the same network with the default gaateway "111.111.111.254"?
Thanks! I think you need contact your hosting to do this They have to do something on their side? What is the server's host/company? what are you running? nix? windows? What flavour of nix? apache/nginx/lightppd? Need more food. Windows 2008 here:
Quote: Originally Posted by jayfella here:
I have added there! The problem is the IP address is not in the same group with Default Gateway.
 
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