Breezejs/Angular/EF - cannot execute until metadastore is populated - angularjs

Question

I started to learn angularjs and trying to put together Angularjs+Breezejs+EntityFramework.
Here is my context cs file:
public class GrantsDbContext : DbContext {
public GrantsDbContext() {
Database.SetInitializer<GrantsDbContext>(new MigrateDatabaseToLatestVersion<GrantsDbContext, Configuration>());
}
public DbSet<OrgItem> OrgList;
}
OrgItem is just model-class (contained: ID, FullName, ShortName), and I set automigrate, and write default connection string in Web.config
That's breeze controller cs file:
[BreezeController]
public class DbController : ApiController {
private EFContextProvider<GrantsDbContext> _contextProvider = new EFContextProvider<GrantsDbContext>();
[HttpGet]
public String Metadata() {
return _contextProvider.Metadata();
}
[HttpPost]
public SaveResult SaveChanges(JObject saveBundle) {
return _contextProvider.SaveChanges(saveBundle);
}
[HttpGet]
public IQueryable<OrgItem> OrgList() {
return _contextProvider.Context.OrgList;
}
}
Here is angular service, that created manager for breeze:
angular.module('app').factory("entityManagerFactory", ["breeze", emFactory]);
function emFactory(breeze) {
new breeze.ValidationOptions({ validateOnAttach: false }).setAsDefault();
var serviceName = "breeze/db";
var metadataStore = new breeze.MetadataStore();
var provider = {
newManager: newManager
};
return provider;
function newManager() {
var mgr = new breeze.EntityManager({
serviceName: serviceName,
metadataStore: metadataStore
});
return mgr;
}
}
That's my controller that called query:
angular.module("app")
.controller("OrgCtrl", ['entityManagerFactory', OrgCtrl]);
function OrgCtrl(entityManagerFactory) {
var vm = this;
vm.orgs = [];
var manager = entityManagerFactory.newManager();
var orgsQuery = new breeze.EntityQuery("OrgList").select("ID, FullName, ShortName");
manager.executeQuery(orgsQuery).then(succesCallback).catch(failCallback);
function succesCallback(data) {
vm.orgs = data.result;
}
function failCallback(error) {
console.log(error);
}
}
When I firstly started the app, database was created with one table '_MigrationHistory' and then I got the error: 'Error: cannot execute _executeQueryCore until metadataStore is populated.'
'localhost:49934/breeze/db/Metadata' is available (200 OK).
All libraries updated with nuget.
Help please to solve this problem!
Thanks!