Hacking downloaded wiiflow why does it freeze with some game?

[Santi1031]

i just downloaded wiiflow and when i go to the games page it shows all of my games and on some games it wont show the cover just a ? mark if i try playing those games it freezes and when i try to turn off the wii i get lots of numbers and it takes a wile for the wii to turn of. i have cfg and the games don't freeze in it but then with cfg it wont show me all the games

1 wiiflow games freezes and the covers dont download
2 cfg wont show me all the game but all covers download
3 i would like to use one or the other if possible

thanks
the newby