cURL login, go to other page and retrieve source

Hi,

I'm trying to make a PHP script which should login to a remote site the go to a subpage and get the source of this page.

The purpose is to retrive an image. This task shall be repeated for every student on my school (though I do believe it will only be necessary to login once, then go to the subpages).

My problem is, that I cannot get the script to login. I have not tried retrieving any images yet, since the first step must be to have the login process working.

I hope there's somebody out there who can help me login to this site and retrieve the source.

I'm trying to login to this form ('brugernavn' is username in Danish, 'adgangskode' is password):
https://www.lectio.d.../285/login.aspx

This is my code:

$curl_connection = curl_init('https://www.lectio.dk/lectio/285/login.aspx');	// establish connection


// cURL options

curl_setopt($curl_connection, CURLOPT_CONNECTTIMEOUT, 30);	// timeout 30 sec

curl_setopt($curl_connection, CURLOPT_USERAGENT,'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)');	// simulated browser

curl_setopt($curl_connection, CURLOPT_RETURNTRANSFER, true);	// force cURL to not display the output but return as a string

curl_setopt($curl_connection, CURLOPT_SSL_VERIFYPEER, false);	// does not trigger error when no SSL certificate

curl_setopt($curl_connection, CURLOPT_FOLLOWLOCATION, 1);	// follow directions from remote sites header

curl_setopt($curl_connection, CURLOPT_COOKIEJAR, 'cookie.txt');	// save cookie in cookie.txt


// data to submit to remote form

$post_data['m$Content$username2'] = '';	//username removed

$post_data['m$Content$password2'] = '';	// password removed


// format data to string (eg. key1=value1&key2=value2)

foreach ($post_data as $key => $value) {

	$post_items[] = $key . '=' . $value;

}

$post_string = implode ('&', $post_items);


// cURL options

curl_setopt($curl_connection, CURLOPT_POSTFIELDS, $post_string);	// post $post_string


print_r(curl_getinfo($curl_connection)); // print error check

echo '<hr />'.curl_errno($curl_connection).'-'.curl_error($curl_connection); // print error numbers


$result = curl_exec($curl_connection);	// execute

curl_close($curl_connection);	// close connection


// go to other page

$curl_connection = curl_init(); 

curl_setopt($curl_connection, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($curl_connection, CURLOPT_COOKIEFILE, 'cookie.txt'); 

curl_setopt($curl_connection, CURLOPT_URL, 'https://www.lectio.dk/lectio/285/SkemaNy.aspx?type=elev&elevid=1628118635');


$result = curl_exec($curl_connection);	// execute

curl_close ($curl_connection);	// close connection

echo $result;	// print source

I have made a file called 'cookie.txt' in the same folder as the script is in and given it the permissions 777.

This is the output of the above code ('log ind' means 'log in' in Danish - therefore the script has obviously not logged in):
Eleven Simon Binderup Støvring, 3z - Skema - Lectio - Mariagerfjord Gymnasium

I hope somebody can help me :-)

Thanks in advance,
Simon B. Støvring