muchas gracias por tu respuesta, chem, pero no acaba de funcionarme  
 
hice lo ke me dijiste tal cual, pero me da estos errores al publicar. 
**Error** Scene=Scene 1, layer=Layer 5, frame=1:Line 1: Statement must appear within on handler
     x1 = correo._x; 
**Error** Scene=Scene 1, layer=Layer 5, frame=1:Line 2: Statement must appear within on handler
     x2 = correo._x + correo._width; 
**Error** Scene=Scene 1, layer=Layer 5, frame=1:Line 3: Statement must appear within on handler
     y1 = correo._y; 
**Error** Scene=Scene 1, layer=Layer 5, frame=1:Line 4: Statement must appear within on handler
     y2 = correo._y + correo._height; 
**Error** Scene=Scene 1, layer=Layer 5, frame=1:Line 5: Statement must appear within on handler
     someListener = new Object(); 
**Error** Scene=Scene 1, layer=Layer 5, frame=1:Line 6: Statement must appear within on handler
     someListener.onMouseUp = function () {  
**Error** Scene=Scene 1, layer=Layer 5, frame=1:Line 20: Statement must appear within on handler
     Mouse.addListener(someListener); 
Total ActionScript Errors: 7 	 Reported Errors: 7  
¿Sabes ke puedo hacer para arreglarlo?