W3 Total Cache not loading css changes

Hello all,

I was wondering if someone could shed some light on the issue I am experience with the plugin w3 Total cache. Prior to downloading the plugin i had minified my css using an online tool. I then downloaded the plugin it is working great. The problem I am having is making changes to my style.css file. I went back into my style.css and put back the original css without it being minified ( I had a copy saved just incase I needed to make changes ). Now whatever I do the changes are not being implemented. Does anyone know why??