Change data regarding song information in iTunes not working,

Hey everyone, I was writing to see if anyone else was seeing this problem. I want to change the data on some of the music in my iTunes library and every time I attempt to do so it will not affect the songs.

Example: I wanted to add genre data to Random Access Memories so I select all the songs in the album. Right click and choose "Get Info." Go to the bottom and type in the genre information and click ok to confirm the change, but then after the dialogue disappears it does not change the song genre information at all.

Thank you for all the help.