PHP & GD open image file error

I'm just starting out with GD in PHP and have a problem. I've created a file named drawimage.php with the contents listed at the end of this message. When I attempt to browse the page in MSIE, (haven't tried it on any other yet,) an error message appears in the browser window and a missing image icon shows below the message. The error message is as follows: Warning: imagegif: unable to open 'out.gif' for writing in /home/httpd/html/wow/pedigree/php/drawimage.php on line 8 I've checked the server with phpinfo(); and it shows that GD is enabled and GIF support is also. The directory "dynamic_images" is set for drwxrw-rw- (to avoid somebody putting something executable in there and executing it). Assuming php is using "nobody" because it's being called by Apache, which is set for "nobody", what could be the problem here? (I'm assuming, because I haven't checked inside PHP for the user yet, but my Apache definitely uses "nobody".) ============================================================================ ===== PHP File Listing ============================================================================ ===== <?php // File: drawimage.php Header("Content-type: image/gif"); // tell user agent to receive a gif image $im = ImageCreate(100,100); // Create the image buffer $black = ImageColorAllocate($im,0,0,0); // Create black color $white = ImageColorAllocate($im,255,255,255); // Create white color ImageLine($im,0,0,99,99); // Draw a diagonal line ImageGIF($im,"dynamic_images/out.gif"); // Create and write GIF file. (THIS LINE GETS THE ERROR!) ImageDestroy($im); // Destroy image buffer ?> <HTML> <HEAD> <TITLE>Test GD</TITLE> </HEAD> <BODY> <IMG SRC="dynamic_images/out.gif"> </BODY> </HTML>