Own songs show as greyed out

[Eefje1975]

I've added my iTunes library in the preferences, however: all my own songs from my library show up in Spotify as greyed-out. On the PC (windows) I can add the greyed-out songs to a playlist, but can't play them. On my iPhone and iPad the songs don't show up at all.

I'm a premium user in NL

Anyone know how to deal with this?

Thanks,

Eefje