youre trying to login to a game that isnt yours that uses a php page? most likely theres some sort of incryption.
put up your source (pm it so i can better help you) or be more specific to the url you are using. as the url you posted "http://www.placeiwanttogo.com" doesnt exist i assume its to hide the actual url your are using.
if this is some sort of hacking attempt then this isnt the place to look for help.