Photoshop Help!

So the other day I was on Photoshop C6 and I was trying to make my text curved (which I have successfully done a few times) and it wouldn’t work. Like I used the circle tool (or whatever it’s called) to make a circle than selected the text tool and clicked on the circle where I wanted the text to go and it didn’t work.

Anyone knows why or has encountered this issue? Or have any suggestions?