Put United States on the top of countries list on sign up page in phpfox

[Rock4eveR]

I am having a hard time putting the united states on the top.I changed it in countries.xml.php :\[code\] <countries><country iso="US" name="United States" /> <country iso="AF" name="Afghanistan" /> <country iso="AL" name="Albania" /> <country iso="DZ" name="Algeria" /></countries>\[/code\]and in module/core/include/service/country/country.class.php I removed all the sql ordering like this :\[code\] ->group('c.country_iso') ->order('') ->execute(($sIso == null ? 'getRows' : 'getRow'));\[/code\]I cleared my cache and refresh ctrl+f5 and Afghanistan is still on the top.Any suggestions please ?