PHP cookies/session problem

[CerealBH]

theres a site, that i can get curl to login, to then i want to navigate through there while still logged in i have added cookiejar but its still not working here is my code

function loginpof($username, $password)
{
$postfields = "?username=" . urlencode($username);
$postfields .= "&password=" . urlencode($password);
$pof = "http://www.website.com/inbox.aspx".$postfields;
$useragent="Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1";
$ch = curl_init(); 
curl_setopt($ch, CURLOPT_COOKIEJAR, "/tmp/cookieFileName");
curl_setopt($ch, CURLOPT_USERAGENT, $useragent);  
curl_setopt($ch, CURLOPT_URL, $pof); 
curl_setopt($ch, CURLOPT_FAILONERROR, 1); 
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); 
curl_setopt($ch, CURLOPT_TIMEOUT, 3); 
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
$result = curl_exec($ch);
curl_close ($ch);
return($result);
}

that is to login then i want to do this

	
function search(){
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_COOKIEJAR, "/tmp/cookieFileName");
curl_setopt($ch, CURLOPT_URL, "http://www.website.com/basicsearch.aspx");
$result = curl_exec($ch);
curl_close($ch);
return($result);
}

but it wont stay loggged in, any help?