Can not work under ext4

[zhonghuafy]

I download Exporter and import into my project, but it seems that it can not work. I got errors below:
Uncaught TypeError: Object # has no method 'reg' Exporter-all.js:204
Uncaught TypeError: Cannot call method 'substring' of undefined ext-all.js:15

the jsp page:

<script type="text/javascript" src="ext/ext-all.js"></script>
<script type="text/javascript" src="exporter/Exporter-all.js"></script>

the js:
tbar: [{
xtype:'exportbutton',
store: userStore
},{ ...
What should I do? Thanks for your kindness and waiting your help.

[amaizgit]

Hello Ed, I'm running into the same issue under ext js 4. Any chance to respond?

thank you in advance