Caching Webhosts and IP's

Hi everyone. This is my first time posting to this list, hopefully I can get some questions answered as they arise, much like this one: It's probably not to difficult to get around, and I think I know how, but just wondering if someone else has had a similar problem. When I run phpinfo(); the variable HTTP_SERVER_VARS["REMOTE_ADDR"] appears as my actual ip. But, I'm running a seperate file, that calls the same variable and the IP is slightly different. At first, I wasn't sure why? but, then I did a lookup. It seems to be the IP of my ISP's caching system. Is there a way around this. It appears that it's doing all the get's, or something???? Thankyou, Graeme.