iis7 php upload big files

Environmet: iis7 + php

I need to upload very big files, 3 GB maximum...

to allow 3GB upload files in iis7: %windir%\system32\inetsrv\config\applicationhost.config

...
<requestfiltering> 
...
<requestLimits maxAllowedContentLength="3145728000" />
...
</requestfiltering> 
...

if i put in php.ini:

post_max_size = 3000M
upload_max_开发者_如何学Cfilesize = 3000M

the login form doesn't work...

and i only put it in upload script:

set_time_limit(0);
$post_max_size = ini_get('post_max_size');
$upload_max_filesize = ini_get('upload_max_filesize');

ini_set('post_max_size', '2901M');
ini_set('upload_max_filesize', '2900M');

...

ini_set('post_max_size', $post_max_size);
ini_set('upload_max_filesize', $upload_max_filesize);

but doesn't work... i don't know how to fix this problem :(

---

i fix it putting the memory limit bigger than post_max_size and post_max_size bigger than upload_max_filesize in php.ini

memory_limit = 4001M
post_max_size = 3001M
upload_max_filesize = 3000M

thanks for Awea

---

You need to set :

max_execution_time
max_input_time

Too but Dagon have right ftp would be better for big files upload

EDIT

Asynchronous upload : uploadify