First event after resume is ignored

Hi,
This might be a mistake in my code but i'm not sure how to solve it. I have a form which sends ajax request on submit and if for example email is already used, it returns an error. Now, i tried to use pause/resume to prevent sending multiple requests, however when i pause, and then resume, submitting again will not work the first time, only the second time.

1. 'form.register submit': function(element, event) {
2.       event.pause();
   
3.       var user = new Model.User(can.deparam(form.serialize()));
4.       user.save(
5.             function(response) {
6.                   //irrelevant
7.             },
8.             function(error) {
9.                   //show error, etc
10.                   event.resume();
11.             }
12.       );
    
13. }