First Install the free version and enable it.
Code:
Code:
https://downloads.wordpress.org/plugin/wp-fastest-cache.zip
Then Download Premium Version enable it aswell.
v1.4
Code:
Code:
http://www98.zippyshare.com/v/ZFXG0LCp/file.html
Make sure the directory name of premium version is "wp-fastest-cache-premium"