Hi,

your were misusing the braces {}

Now, while I know of better ways to create an away script, i tried to edit your script the least as possible, so that you can experiment yourself in making it better:
Code:
  
alias PMon { 
  %awy.stat = on
  echo -a Away Skript 0n | say Away Script On
  if ($1) { set %awy $1 }
  set %reason $$?="Reason?"
} 
[color:red]  [/color] 
alias PMoff { %awy.stat = off | echo -a Away Skript Off | say Away Script Off }
 [color:red]  [/color] 
on ^*:open:?:{
  if !$notify($nick) { halt }  
  if (%awy.stat == on) { .msg $nick Sorry I'm Currently Away Right Now %reason $+ , Please Leave A Message and I'll Get Back To You As Soon As I Can } 
}


I'm curious though why you are doing set %awy $1, since you're not using that variable %awy anywhere else.
Btw I changed the order of if !$notify($nick) { halt } and where it says that you are away. Because people who are not on your notify list, cannot leave a message, so then you might as well simply already halt the script there, before telling them that you are away.

Greetz

Gone.