Professional :: Using Text And Converting It Into A Button?

I have used some text and coverted it into a button,
 
I have done my up over down and hit frames,
 
I have gone into actions and used the following code,
 
on (press)  {getURL ("http://www.google.com");
}
 
when i do a test movie i get the follwoing error
 
**Error** Symbol=Symbol 96, layer=actions, frame=1:Line 1: Mouse events are permitted only for button instances     on (press)  { Total ActionScript Errors: 1   Reported Errors: 1