*******External hard disk need help !!!!!!!!!!!!!!!!!!! everything gone********?

i have an external hard disk with all my important data, and i was working with it to backup some files in ubuntu. i don't realy know what happened but from this moment on to the next one it didn't recognized the External disk anymore so i plugged it into my other pc and it didn't create the icon in my computer ether. so that was my first real problem, i downloaded some recovery software and i can get into the drive but all information was deleted, so i realy need help one this one i have to find a program that gets back all the information on the external disk, and not to find the files and save tem on for example a pc because my pc doesn't have that much capacity. i'm very great full for help .