The problem is same goes here(see screenshot):
|Orbit Download fail from Mediafire|
So, what i did is by clearing the cookies from "http://www.mediafire.com/".. To do this, follow these steps:
|Remove Individual Cookies|
1- Open Firefox web browser
2- Select "Tools"(or press ALT to show it) and select "Options"
3- Select "Privacy" tab and click "remove individual cookies"
4- Search for "mediafire"
5- Select all(begin+shift+end) and click "Remove Cookie"
Try to resume your download task in Orbit Downloader. Hopefully it not still appearing an error and you dont need to reset/start from the beginning of download process.