Minify Command

[amqex]

Everything works great, but I am having trouble getting the setMinifyCommand to work. I am trying to use yuicompressor. I have my path to yuicompressor set correctly but the css or js is not being compressed.

I have added:

->setCacheDir(PATH_PROJECT . '/data/cache/css')
->setDocRoot(PATH_PROJECT . '/public')
->setUseMinify(true)
->setMinifyCommand('java -jar /path/to/yuicompressor-2.4.7/build/yuicompressor-2.4.7.jar -o :filename')
->setUrlPrefix('/stylesheets');

I have tested the following yuicompressor command manually and it works just fine:

java -jar /path/to/yuicompressor-2.4.7/build/yuicompressor-2.4.7.jar test.css -o test.min.css

Is there something I'm leaving out?