Coleco Adam Cartridge Backup DDP

[AutoAdam]

Hello everybody, I just got this cartridge backup tape but I'm not sure what I'm doing wrong, I insert the pack and keep trying to backup the cartridge but all I get is the message that the game is "not enough room for this game" even though there's nothing else on the tape, also I tried using blank tapes with nothing on them, still get same error message? Video hustler is also not on the tape even though it says it is. Any ideas on what I'm doing wrong? Thanks!