is this a bug?

I posted this to the general list earlier and received no reply. This code worked fine with php3. I just did a clean install of windows and installed PHP 4.0.1 and this code: <BODY> <h1>Welcome to Administration Page</h1> <h3>Choose an Option</h3><ul> <?php // open directory $myDir = opendir("."); // get each listing rewinddir($myDir); while($file_in_dir = readdir($myDir)) { if (!(($file_in_dir == ".") || ($file_in_dir == "..") || ($file_in_dir == "index.php"))) { print "<li><a href=\"$file_in_dir\">" . filetype($file_in_dir) . " - $file_in_dir</a></li>\n"; } } closedir($myDir); ?> </ul> </BODY> Gives me these messages, but it works fine SOMETIMES. Warning: 1 is not a valid Directory resource in C:\Work\index.php on line 20 Warning: 1 is not a valid Directory resource in C:\Work\index.php on line 21 Warning: 1 is not a valid Directory resource in C:\Work\index.php on line 26 Data Driven Design P.O. Box 1084 Holly Hill, FL 32125-1084 Phone : (904) - 226-8979 URL : http://www.datadrivendesign.com URL : http://www.rossidesigns.net