asp.net mvc - jQuery Sort and MVC Stopped Working -

i getting following error when jquery sort calls sort action:

the parameters dictionary contains invalid entry parameter 'donationids' method 'system.web.mvc.emptyresult sortdonations(system.collections.generic.list1[system.int32])' in 'vol.web.areas.activityarea.controllers.donationcontroller'. dictionary contains value of type 'system.collections.generic.list1[vol.models.token]', parameter requires value of type 'system.collections.generic.list`1[system.int32]'.
parameter name: parameters

jquery:

$("#dlist").sortable({         handle: '.sorthandle',         update: function () {             var order = $('#dlist').sortable('toarray');             $.ajax({                 url: '/activity/donation/sortdonations',                  data: { donationids: order },                 type: 'post',                 traditional: true             });         }     }); 

post values:

parametersapplication/x-www-form-urlencoded donationids 1 donationids 8 source donationids=1&donationids=8 

mvc action:

 public emptyresult sortdonations(list<int> donationids)         {               int order = 0;             foreach (int in donationids)             {                 donationrepository.updatesortorder(i, order);                 order++;             }               return new emptyresult();         } 

it working seems reference class, token. ideas going on or start looking?

enter code herei changed action use string , resolved issue.

     [httppost]         public emptyresult sortdonations(string[] donationorder)   {      int order = 0;      foreach (var in donationorder)     {         donationrepository.updatesortorder(convert.toint32(i), order);         order++;     }       return new emptyresult(); }