Cookie only worked on "/" but not in any sub-directories

Hi, First of all, I'm very new to PHP. I tried to call setcookie() function to set a cookie using the following code: setcookie ("TestCookie", "Some Value", time()+3600); echo $TestCookie, "<BR>"; It works perfectly for the root directory, but when i try to do the same thing in another directory called '/phptest/', it didn't work at all. I tried to switch on netscape's "Warn me before accepting cookie" and saw that the cookie was indeed sent to the client. However, I could not read back the cookie's value no matter how many times i refresh netscape. Can anyone tell me what's going on? Any help would be greatly appreciated. Thanks, Aaron