W3 Total Cache is consuming too much CPU

Hi guys,

Because I had problems with Super Cache I decided to change to W3TC but now it seems that this plugin is slowing down my site, rather than speeding it up. I scanned my site to see runtime for every plugin and W3TC is taking up 42%, which is massive!

What could be the problem, does anyone have an idea?

https://fbcdn-sphotos-h-a.akamaihd.net/hphotos-ak-prn2/v/t35.0-12/10287967_10152448486273530_1224562279_o.jpg?oh=c0d3c9c0918ac7bf7708ab515a98d319&oe=535CBE58&__gda__=1398560060_586f037a156000af6f68400df47be44a

Cheers