v3rona

Use FTP program such as FileZilla and connect to your hosting account with it. Then go to /wp-content/gallery folder and right click on it. Select: File Atributtes… and in the window that opens set numeric value to 755.

Try if that helped.

@wamitchell:
Thank you for your reply. I solved my problem this way:

_____________________________________________________________________
Many thanks to John Blackbourn at https://lud.icro.us/wordpress-plugin-image-upload-http-error-fix/ for helping me at solving this problem!

My ERROR 503 is gone now and Flash unloader works like charm!

SOLUTION:

If you’re happy editing your blog’s .htaccess file, try adding this to the end of the file:

<IfModule mod_security.c>
<Files upload.php>
SecFilterEngine Off
SecFilterScanPOST Off
</Files>
</IfModule>

NextGen uses a file called upload.php for handling uploads, and this code should disable mod_security on that file.

Many thanks to John Blackbourn at https://lud.icro.us/wordpress-plugin-image-upload-http-error-fix/ for helping me at solving this problem!

My ERROR 503 is gone now and Flash unloader works like charm!

SOLUTION:

If you’re happy editing your blog’s .htaccess file, try adding this to the end of the file:

<IfModule mod_security.c>
<Files upload.php>
SecFilterEngine Off
SecFilterScanPOST Off
</Files>
</IfModule>

NextGen uses a file called upload.php for handling uploads, and this code should disable mod_security on that file.

@wamitchell:

I tried this out, didn’t work out for me. ??