Suggestion:
You can't just stick a burned game in the wii and expect it to work, silly. You need to find the WAD of WiiBackupLauncher, it installs the channel you need to use to play burned games.
You are burning them just fine. When you have the backup launcher all set up, the games you already burned should work.
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maybe a game copy software is needed to burn your game. Even if the games are well kept and stored carefully, nothing can protect against the inevitable degradation of the disc that eventually makes the most loved games finally unusable. So you need to Copy Games to ensure the data integrity.
i used a software to copy my wii game, and i don't need to worry about the game will broken someday while i am playing it, here is the link to the software, hope they may also appropriate to you:
http://www.copygames.org/guides/copy-wii-games.html
for more information, just google it:
http://www.google.com/search?hl=en&source=hp&q=site%3Ahttp%3A%2F%2Fwww.copygames.org%2F&btnG=Google+Search&aq=f&aqi=&aql=&oq=&gs_rfai=