Every other game has 'BUY' in orange on the bottom right hand corner of the box. The Arsenal game has 'SIGN IN'. Still not responding despite all of your good advice. Never mind - guess it means I've just missed out. Thanks anyway :)
Had to re-create an account (seem to remember something about having to do this recently?) - - now trying hit 'Sign In' on the Arsenal tkts tab - - not responding. Any clues? I'm sure I'm missing something obvious - - happy to be flamed . . .