What does the '+' mean in your 0<mp(1)<140 + 0<mp(2)<140 expression? While you can add logical expression, I'm fairly certain that's not what you mean.
Your code would be a lot more readable if there wasn't so many unnecessary brackets.
if mp(1) > 0 && mp(1) < 140 && mp(2) > 0 && mp(2) < 140
is exactly the same as you've written but a lot more readable.
Finally, you'll have to explain what 'that's incorrect' means.
