Previous not working.

Hello,

On our development site: http://www.nas.uk.com/wpr/ we have partner pages which include your slider.

For example: http://www.nas.uk.com/wpr/partners/datacore

The next button works fine but when pressing the previous button, it goes to the next slide instead of the previous slide.

http://ww.wp.xz.cn/extend/plugins/meteor-slides/