keeps saying file could not be read....

[CarolineeOx]

Heeey

I'm using Live 8 and everytime I try and drag on a file it says ' file could not be read.It may be corrupt or not licensed '.
It happens with every file I try with, it only started recently, I used the songs before on it without any problem. Anyone know how to fix it? Thanks

[CarolineeOx]

Music from beatport ect. The samples are working. It's just when I try and put on music and then it doesn't work! Thanks