Genius not working!

I've downloaded a few songs onto itunes and also syncd this so it matches my ipod.

I'd like to try out the new genius feature and i have turned Genius on on itunes but when i try to start Genius either on itunes or my ipod it says it can't do it with that song.

And that's on all the songs I have downloaded! I have tried updating Genius then pressing the genius button on itunes but it still comes up with the same thing!

Any ideas?!

Vicki

I've found this problems with a few songs on my itunes but difference is I've got 3000+ songs. I think that if you set the amount of songs you want in a playlist your more likely too get a result. I also think if you increase the amount of songs you have similar artist, genres you might get a result, keep me posted