file uploads

Hi, I have a file upload problem, but I don't think it's a permission thing (if only, that would be simple!). I have written a resizing method for a class I'm working on, and it always fails on the imageJpeg() at the end of the method. This is the error I get... imagejpeg(): Unable to open '/Library/WebServer/Documents/my_site/_lib/_products/2_big_me.jpg' for writing in /Library/WebServer/Documents/my_site/_lib/_classes/class.products.php on line 132 Now, here's the strange bit, if I call my method and just use move_uploaded_file() then the image is saved correctly, so  I know it's not the permissions, could someone have a little look  at my method and let me know if there's anything wrong with it please // $ID is an integer used for naming purposes // $aImage is an array, it's basically a copy of $_FILES["image"] // BASE_DIR is a constant var and holds, yep you guessed it, the base dir of the site! // IMGMAXHEIGHT & IMGMAXWIDTH are also constants used for resizing purposes function storeBigImage($ID, $aImage){

        // create filenames
        fopen($aImage['name'], 'r');
        $aNewImage['real_name'] = $aImage['name'];
        $aNewImage['new_name'] = $ID . '_' . 'big' . '_' . $aNewImage['real_name'];
        $aNewImage['image_loc'] = BASE_DIR . '_lib/_products/' .  $aNewImage['new_name'];
         
        // copy original image
        $aNewImage['original_image'] = ImageCreateFromJpeg($aImage['tmp_name']);
        $aNewImage['sizes'] = getimagesize($aImage['tmp_name']);
        $aNewImage['width'] = $aNewImage['sizes'][0];
        $aNewImage['height'] = $aNewImage['sizes'][0];
        
        if($aNewImage['width'] >= IMGMAXWIDTH || $aNewImage['height'] 
= IMGMAXHEIGHT){
            

            // calculate ratios
            $iRatio_w = IMGMAXWIDTH / $aNewImage['width'];
            $iRatio_h = IMGMAXHEIGHT / $aNewImage['height'];
            $iRatio = $iRatio_w < $iRatio_h ? $iRatio_w:$iRatio_h;
            
            // calculate new dimensions
            $aNewImage['new_width'] = $aNewImage['width'] * $iRatio;
            $aNewImage['new_height'] = $aNewImage['height'] * $iRatio;
            
            // save resized image
            $aNewImage['new_image'] = ImageCreateTrueColor($aNewImage['new_width'], $aNewImage['new_height']);
            ImageCopyResized($aNewImage['new_image'], ImageCreateFromJpeg($aImage['tmp_name']), 0, 0, 0, 0, $aNewImage['new_width'], $aNewImage['new_height'], $aNewImage['width'], $aNewImage['height']);
            //ImageJpeg($aNewImage['new_image'], $aNewImage['image_loc']);
            ImageJpeg($aNewImage['original_image'], $aNewImage['image_loc']);
        
        } else {
        
            // save original image
            //ImageJpeg($aImage['tmp_name'], $aNewImage['image_loc']);
            ImageJpeg($aNewImage['original_image'], $aNewImage['image_loc']);
            //ImageJpeg($this->aArgs['Image']['tmp_name'], $aNewImage['image_loc']);
        }
    }

I have ftp'd into my local server and the folder in question is set at 777, and like I said it works fine if I don't use this class Any ideas ?? Thanks, Jon jon bennett | jon@jben.net new media designer / developer _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ J b e n . n e t 91 Gloucester Rd, Trowbridge, Wilts, BA14 0AD t: +44 (0) 1225 341039 w: http://www.jben.net/