Julie,
By continuous, do you mean Continuous AF (one of the menu settings) that let's the live view continuously focus, or do you mean continuous as in high speed shutter which would be the Drive setting?
high speed frames per second, it will only allow one shot at a time, usually if you hold down the shutter button it will take more than one photo but in live view it has decided not to allow it
Edit
I have figured it out, I had somehow changed the live view setttings, all back to normal now


