touchSlider "mouseTouch: true" option won't work - slider

Question

I am currently working on a slider, using touchSlider, and it mouseTouch option won't work for me.
Slider itself works fine, but not the mouseTouch option.
What am I doing wrong?
Here is my js:
$(document).ready(function() {
$(".touchslider").touchSlider({ mouseTouch: true });
});
and html:
<div class="touchslider">
<div class="touchslider-viewport" style="width:500px; height: 375px;overflow:hidden; border: 1px solid #f00;"><div>
<div class="touchslider-item"><img src="img/3540115854_5d302001da.jpg" width="500" height="354" /></div>
<div class="touchslider-item"><img src="img/3542680555_ea43d85e0a.jpg" width="500" height="354" /></div>
<div class="touchslider-item"><img src="img/3540231388_f8ec22b549.jpg" width="500" height="354" /></div>
<div class="touchslider-item"><img src="img/3546828250_6f91b64ba7.jpg" width="500" height="354" /></div>
</div></div>
<div>
<span class="touchslider-prev">←</span>
<span class="touchslider-nav-item touchslider-nav-item-current">1</span>
<span class="touchslider-nav-item">2</span>
<span class="touchslider-nav-item">3</span>
<span class="touchslider-nav-item">4</span>
<span class="touchslider-next">→</span>
</div>
</div>

Answer 1

Got the same problem when accessing the .html via my local file system using the file-protocol
file://pathtothehtml/touchslidertest.html
The problem does not occur when I accessing the .html using http
http://hostnametothehtml/touchslidertest.html
I used chrome,firefox and safari on MacOS - using http solved the problem on all of them.
cause analysis
The browser handle the results gathered using the file-protocol different to results gathered via the http.
Careful: the following is only guessing, since I had not found anything about how any of the common browser handles the file-protocol.
Maybe the browser supports drag&drop for the file-protocol. This support may override the event handling of the page interpreter in the browser - such that the drag event on the image does never reach the DOM-event handling routine for the page.