ko is not defined when adding extension to Knockout

Hi all,

I am trying to ass an extension to Knockout (knockout.pausable), but I get the error:

Uncaught ReferenceError: ko is not defined

I am using the requirejs to control the dependancies, but there seems to be a problem:

requirejs.config({
    shim: {
        'Lib/jquery-2.1.1': { exports: '$' },
        'Lib/knockout-3.2.0': { exports: 'ko', deps: ['Lib/jquery-2.1.1'] },
        'Lib/knockout-pausable-1.1.1': { deps: ['Lib/knockout-3.2.0'] }
    }
});

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and then in the specific js file I want to use it, I have

require(["Lib/jquery-2.1.1","Lib/knockout-3.2.0","Lib/knockout-pausable-1.1.1"], function ($, ko, kopause) {
    . . . . 
});

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Any ideas what I have done wrong?

Any help would be appreciated.

Thanks a lot,

James