Slider Blocking Navigation Bar Text

Hi

I have a problem and unable to solve it. I have just added a new image to the slider and notice that the slider wrapper is blocking my text from navigation bar. In other words, I am unable to click the text from navigation bar. I have used the firebug to check what is going on and realise <div class=”slider-wrapper theme-default”> is blocking the way.
Is there any way to remove this blocking ?

Thanks.

https://wordpress.org/plugins/ml-slider/