Left Arrow (Preview) not clickable

Hey there,
i got one question about your Slider Plugin. I used it on my page and I like it so thank you in advance! 🙂 But I got the following problems:

1. The left arrow (preview) ist not clickable on my page – do you know why?
2. The Slider ist not really working in Google Chrome Browser
3. In Safari the right arrow (next) gets a little cut off by hovering over it

Thank you for helping me with that!

Best regards,
Ronja

The page I need help with: [log in to see the link]