As others have mentioned, your parentheses are unbalanced. I have a similar problem in complex conditional statements, and I have found a trick that helps me - at least when I am developing the code.

Instead of having the conditional all on the one line, like if (($Age < 13) && ($Age > 0)) I try to space things out, like:

if    (($Age < 13) &&
       ($Age > 0)      )    {
      some block of statements;
}
elsif (($Age < 18) &&
       ($Age > 12))    )     {
      another block of statements;
}
else                         {
      a final block;  
}
[download]

This makes a visual scan of the whole if - elsif - else block easier. Once it all works, you cansquash the lines up if you wish.

Once you start to get into complex data structures then this can solve a lot of stilly typographical erors.