Animation plays without a bool, but after adding it just goes still

So, I can get the Animation to play if I have

 function Update(){if(!obj.animation.IsPlaying(animationClip[0].name)){
         obj.animation.CrossFade(animationClip[0].name);
     }}

but

     function Update(){if(isPlaying && !obj.animation.IsPlaying(animationClip[0].name)){
         obj.animation.CrossFade(animationClip[0].name);
     }}

to enable Playing I have a play button and I can see this in the inspector as being true, but the model just goes still and using this print

 print(obj.animation.IsPlaying(animationClip[0].name) + "   " + obj.animation.clip.name + "  "+ obj.animation[animationClip[0].name].time);

Which says True, my Animation name, and the time is always 0;

Any ideas? It's probably obvious, but I cant see the cause. I also have a stop that changes isPlaying to false and it will CrossFade to the original animation. I have also tried Play instead of Crossfade still no luck.