PHP 4 Apache 2 and Windows XP

I cant figure out whether this is a PHP problem, apache problem or the board that im using. I am posting this to each respective place. I am using dyndns's services, and heres the problem If I access my website through localhost or the ip of the internal machine, there is no problem. But when I use dyndns's host, the pages dont load HALF the time. Sometimes I get the correct page, and sometimes I get the page I should. there doesnt seem to be any real corellation between getting it and not getting it. Hit reload a couple of times and it pops up. If anyone has any thoughts, or anything to try, please let me know Thanks Matt Carlson saryon@swbell.net