swf cant communicate with the php on my server

[chocolate]

i have my swf file and the php file setup, my php file in on my server's side to pull datas from the database. when i test my swf file before i upload it to my server, everything works. but when i upload my swf file up to the server and run it from the server, it seem like it can't communicate with the php file and on the status bar it's always showing "waiting for myurl.com"...... i found one similar problem solve from another forum by changing the permission of the files, i tried but that doesn't work, can anyone help me out??

[audiopro]

A few things to check - sorry if they are obvious but worth checking.
Are the .swf and PHP on the same domain?
Are you sure Flash is calling the correct URL?
Try pasting the URL from the Flash script into the address bar.
Does the whole thing just hang or is there an error eventually?