Newbie : This WAD is not bootable

So i've just wanted to play an old game from wiiware (my life as a king) with the DLC and i've found a wad on this forum but as the title says.. "This WAS is nto bootable" and i can't clearly find why on google, other people don't seem to have an issue.

Do you know what's wrong with it? I'm using dolphin 5.0-15445

Do you have 2 WADs? The Game and the DLC, or maybe just the DLC. Then you need the game too.
The DLC's just what it say, DLC, not the full game. You need the full game to boot and install the DLC before, then you have new content.