Usb device isn't FAT 32 or problem with usb device.It's a .key file,by the way,that you should be loading.Saying that,I'm not sure that softcam works,it is very old.And it depends on what box you have.Cheers
Do you have the file on your USB just as it is or inside a Folder, Actually just checked both files and they are .txt files that open with wordpad they should actually be named Softcam.key file to actually upload directly to the receiver