can't set cue points. tone arm not moving. wav display indicator not visible.

The tone arm stays at the start of the record and the marker doesn’t move along the wav display at the top.

I can skip through a tune, but nothing to indicate where I am on the tune.

I can’t set cue points.

What’s happened? What am I doing wrong? Is it because of ios7 update?

Using iphone 4s with ios7