CakePHP Compression not working

[huginen]

I'm trying to get my CSS and JS files to compress using the YUICompressor based on the code in this blog post: http://www.pabloleanomartinet.com/cakephp-2-0-compressing-js-and-css-using-ccss-or-yuicompressor/However when I then visit my compressed CSS e.g. /ccss/master.css it just shows the error: \[code\]Yuicompressor could not compress the file\[/code\]I'm not sure where to start with this... But I have done everything in the post and changed the permissions of all the folders involved including creating the cache ones. Not sure how to debug or find out what the problem is. Perhaps JAR files not working on my server?Any help suggestions very much appreciated. Thanks