Direct won't work in Login, works elsewhere in app

Code:

   Ext.define('ServcSol.Application', {
           extend: 'Ext.app.Application',
    
    name: 'ServcSol',
    
    requires:[
      'ServcSol.DirectAPI',
      'Ext.form.action.DirectSubmit'
    ],
    
    views: [
    'manyviewshere'    ],

    controllers: [
        'manycontrollershere'     ],

    stores: [
       'manystoreshere'     ],
    
    launch: function () {
          var win = Ext.create('Ext.window.Window', {
                closable : false,
                resizable : false,
                draggable : false,
                border : false,
                title: 'Service Solutions',
                titleAlign: 'left',
                height: 800,
                width: 1000,
                api: {
                  submit: 'ExtRemote.DXLogin.authenticate'
                 },
                paramOrder: ['username', 'pwd'],
                layout: {
                  type: 'vbox',
                  align: 'center',
                  pack: 'center'
                },
                items: [
                  {
                    xtype: 'form',
                    title: 'Login',
                    itemId: 'login',
                    height: 300,
                    width: 300,
                    frame: true,
                    layout: {
                            type: 'vbox',
                            align: 'center'
                          },
                    items:[
                    {
                        xtype: 'textfield',
                        margin: '30 0 0 0',
                        itemId: 'username',
                        fieldLabel: 'User Name',
                        allowBlank: false,
                        name: 'username',
                        emptyText: 'Username',
                        width: 225,
                        labelWidth: 100
                    },
                    {
                       xtype: 'textfield',
                       margin: '10 0 0 0',
                       inputType: 'password',
                       fieldLabel: 'Password',
                       allowBlank: false,
                       name: 'pwd',
                       emptyText: 'Password',
                       width: 225,
                       labelWidth: 100
                    },
                    {
                       xtype: 'button',
                       text: 'Login',
                       margin: '20 0 0 0',
                       itemId: 'loginBtn',
                       width : 80,
                       formBind: true,
                       handler: function(){
                       var loginFrm = Ext.ComponentQuery.query('#login')[0];
                       loginFrm.getForm().submit({
                              success: function(form, action) 
                              {
                                 Ext.create('ServcSol.view.Viewport');
                                 win.destroy();
                              },
                                 failure: function(form, action) 
                              {
                                 console.log('Login Failed');
                              }
                        });          
                     }  
                 }
             ]} 
          ] 
      }) 
      win.show();
      } 
  
});