Help Problems changing the messaging background

[Haley Carroll]

So I've only had the Galaxy S4 for a couple weeks, and when I got it I had changed the background in the messaging app. I went to change it again today, and it wouldn't let me unless I took the picture with the camera. I tried every picture I had, I tried clearing the messaging cache and data, I tried clearing the Gallery cache and data. This is really getting quite annoying. Someone please help.