Animation will not play

Hey guys, I cannot get my run animation to play. It works and it plays just fine if I set it as the walk animation. It also works for both walk and run if I make both animations be the run animation. If anyone can help it would be much appreciated. Here is the code.

void MoveTowards (Vector3 direction) {
direction.y = 0;
int speed = walkSpeed;
animation.Play("deerwalk");



if (walkInRandomDirection) {
speed = randomSpeed;

}

if (executeBufferState) {
speed = runSpeed;
animation.Play("deerrun");
}