Xbox Music wont play certain songs?

Xbox Music (the service on xbox 360 that replaced Zune) isnt playing certain songs. I paid the monthly subscription fee so there isnt a "Free/Premium content availability" issue here. But whenever i try and play a song, most notably WhiteChapels songs, the title becomes whited out instead of black text like the others, and when highlighted, the option to play it dissappears. At first i thought it was strict content filtering bbut im not sure cus theres no option to change it. Why is Xbox Music preventing me from accessing some content which i paid for??