back button doesn't work!

[byemen]

this is my view file

CustMain.js

Ext.define('SFA-BMT.view.CustMain', {
extend: 'Ext.navigation.View',
xtype: 'custMain',

requires: [
'Ext.form.FieldSet',
'Ext.dataview.List',
'Ext.data.proxy.Ajax',
'Ext.field.Search',
'Ext.data.Store',
'Ext.field.Select',
'SFA-BMT.model.MDL_COMMON'
],
initialize:function(){
this.loadCombo();
this.loadCustList();
},
loadCombo: function(){
var custStore = new Ext.data.Store({
model:'SFA-BMT.model.MDL_COMMON',
proxy:{
type:'ajax',
url:'SPMMain.spm?connection=L&pg_mode=dev&sql=mdms/mp/cust:BMT_CUST_TYPE&datatype=json',
reader: {
type:'json',
rootProperty:'dataset.row'
}
},
autoLoad:true
});
var grpStore = new Ext.data.Store({
model:'SFA-BMT.model.MDL_COMMON',
proxy:{
type:'ajax',
url:'SPMMain.spm?connection=L&pg_mode=dev&sql=mdms/mp/cust:BMT_SC_GRP&datatype=json',
reader: {
type:'json',
rootProperty:'dataset.row'
}
},
autoLoad:true
});
Ext.getCmp('selectGrp').setStore(grpStore);
Ext.getCmp('selectCustType').setStore(custStore);
},
loadCustList:function(){
var custStore = new Ext.data.Store({
autoLoad: true,
fields: ['CUST_NM', 'CUST_SEQ', 'HP', 'CR_TYPE', 'CUST_TYPE_NM', 'CUST_TYPE', 'SC_GRP_SEQ'],
proxy: {
type: 'ajax',
url: 'SPMMain.spm?connection=L&pg_mode=dev&sql=mdms/mp/cust:BMT_CUST&datatype=json',
reader: {
type: 'json',
rootProperty: 'dataset.row'
}
}
});
Ext.getCmp('custList').setStore(custStore);
},
config:{
title: 'Contact',
iconCls: 'user',
fullscreen: true,
// url: 'contact.php',
navigationBar: {
hidden: false,
},
items: [{
xtype: 'list',
// itemTpl: '{title}',
itemTpl: '<div style="width:100%;height:100%;display:inline-block;margin:auto auto">'+
'<p style="width:100%;font-size:14px;margin-right:3px;color:#2233ff"><span style="font-size:20px;margin-right:10px;color:black">{CUST_NM}</span>{CUST_TYPE_NM}</p>'+
'<p style="width:100%;font-size:14px;margin-right:3px;color:#2233ff"><span style="font-size:20px;margin-right:10px;color:black">{HP}</span>{CR_TYPE}</p>'+
'</div>',
fullscreen: true,
id:'custList',
loadingText:'조회중..',
emptyText:'데이터가 없습니다!',
// ui: 'round',
pinHeaders: false,
onItemDisclosure: true,
// title: 'Recent Posts',
items: [{
xtype: 'button',
style:'width:98%;height:40px;margin:10px auto',
scrollDock: 'bottom',
docked: 'bottom',
text: 'Load More...'
},{
xtype: 'toolbar',
docked: 'top',
style: 'width:100%',
layout: {
type: 'vbox',
align: 'middle'
},
items:[ {
xtype: 'searchfield',
name: 'search',
placeHolder: '이름 또는 전화번호',
style:'width:90%',
listeners: {
change: function (field, evt) {
//Ext.getCmp('myFieldSet').setTitle(field.getValue());
} // keyup
} // listeners
},{
xtype: 'selectfield',
label: 'GROUP',
labelWidth: 70,
style:'width:90%',
id: 'selectGrp',
displayField : 'CODE_NM',
valueField : 'CODE',
listeners: {
change: function (field, evt) {
//this.getStore().filter("",field.getValue());
} // keyup
} // listeners
},{
xtype: 'selectfield',
label: 'TYPE',
labelWidth: 70,
style:'width:90%',
id: 'selectCustType',
displayField : 'CODE_NM',
valueField : 'CODE',
listeners: {
change: function (field, evt) {
//Ext.getCmp('myFieldSet').setTitle(field.getValue());
} // keyup
} // listeners
}] // items (toolbar) }
}]
}] // items
}
});

and this is my controller file.

CustMainControl.js

Ext.define('SFA-BMT.controller.CustMainControl', {
extend: 'Ext.app.Controller',

config: {
refs: {
custMain: 'custMain'
},
control: {
'custMain list': {
itemtap : 'showCustDetail'
}
}
},


showCustDetail: function(list, index, element, record){
this.getCustMain().push({
xtype: 'custSimple',
title: record.get('CUST_NM'),
html: record.get('CUST_SEQ'),
scrollable: true,
styleHtmlContent: true
});
}
});

when I tap an item on a list it works fine but, when I tap a back button from a detail view,
it doesn't work, what's wrong? does anyone have a solution??

[cyee]

Try using routes