Call to undefined function: imap_open()

[Anon]

I'm getting this error:

Call to undefined function: imap_open() in /tickets.inc.php on line 73

Here's the code snippet

/ Check each pop accounts / categories /
while ($cat_row = mysql_fetch_array($cat_res)) {
$mbox = imap_open("{".$cat_row["pophost"]."/pop3:110}INBOX",$cat_row["popuser"],$cat_row["poppass"])
or die("can't connect: ".imap_last_error());

Now what the hell is wrong with it? I can't see it. Anybody out here who can help me?

[Anon]

Are you sure PHP was compiled with imap? You can use the phpinfo() function to find out.