calling php from flash

tammy

hi all,
trying to do something which i'm sure is pretty straightforward but am having some problems. heres what i'm at, i have a flash button, the actions i have associated with this button should call somefile.php and thats it. But it keeps saying somefile.html not found so i'm guessing the getURL() function in flash is only for html?? Heres what i have for my actionscript
on (press) {
getURL(somefile.php);
}
any ideas, should i be providing other parameters and if so what are they?? ta for any help
tammy