Dojo button disappears on web ui

Hi,

In my js file, I have created a dojo button which invokes a REST service.
This is how Iam creating the button:

this.myButtonAF= new dijit.form.Button({
id:"clone",
title: "Clone",
label: "Clone"
}
);

In Browser(both IE and FF), first time when the page is loaded, the button appears. But when the page is displayed from the recently viewed items,
the button just does not show up.

Is this a known issue or can you please suggest something to fix this.

Thanks!!