Remote won't unlock door and and can't stick key in door lock

Just picked up this 2011 today. Remote seemed to work fine this morning as well as the door lock. Tonight when I try to unlock it with the remote, the lights flash 3 times but none of the locks do anything. Same thing happens if I press the other two buttons. 3 flashes. Battery in the remote bad? It works from 50 feet away. Wouldn't be too bad if I could at least open the door with the key but the blade won't all the way in all of a sudden.