Honda crv 2006 sat nav problem. Not the usual unfortunately!?

Hi there,

I just got a 2006 honda crv exec and normally the sat nav problem is the disc reading error but unfortunately or fortunately this one doesn't say that but when the screen comes up to accept that you'll drive safely I can't select ok, the enter button doesn't do anything. However, when the next screen comes up the enter button works fine to turn it off etc so it's on,y on the t and cs screen..... Any ideas??