Defective--needs quite a bit of work

I have the new iPhone 3Gs.
Basically, this has the music but no one singing. HOWEVER, several of the songs dont work at all. When I click on them, it just shuts down the program altogether as if I closed it. I cant even get to the lyrics (glad to still have the Lite version installed.) Also, when I go back to the main menu without pausing/stopping the song, there is no longer anyway to stop it from playing other than letting it finish on its own. If I go into another song and hit play, it just plays it on top of the other song. This would be a really fun app if it worked. Please fix.

Meadmaker93 about Sing Along