Noob SASS error (permission denied)

I just created the sass directory in my stylesheets directory and when I reload my page I get this error:

Status: 500 Internal Server Error   Permission denied - /Users/Justin/kicksite/trunk/public/ stylesheets/ application.css     /usr/local/lib/ruby/gems/1.8/gems/haml-2.0.0/lib/sass/plugin.rb: 72:in `initialize'     /usr/local/lib/ruby/gems/1.8/gems/haml-2.0.0/lib/sass/plugin.rb: 72:in `open'     /usr/local/lib/ruby/gems/1.8/gems/haml-2.0.0/lib/sass/plugin.rb: 72:in `update_stylesheets'     /usr/local/lib/ruby/gems/1.8/gems/haml-2.0.0/lib/sass/plugin.rb: 46:in `each'     /usr/local/lib/ruby/gems/1.8/gems/haml-2.0.0/lib/sass/plugin.rb: 46:in `update_stylesheets'

How do I set the correct permissions?

Yep, all of them are 755.

Also check the files within the directories.

All of the files are 644 and the owners are correct. Does this show what the problem might be?

command I entered: ls -la

total 88 drwxr-xr-x 19 Justin Justin 646 Mar 20 11:01 . drwxr-xr-x 19 Justin Justin 646 Mar 18 10:49 .. -rw-r--r-- 1 Justin Justin 6148 May 11 15:24 .DS_Store -rw-r--r-- 1 Justin Justin 1337 Apr 23 13:03 .htaccess drwxr-xr-x 9 Justin Justin 306 May 13 12:34 .svn -rw-r--r-- 1 Justin Justin 947 Jan 18 13:13 404.html -rw-r--r-- 1 Justin Justin 930 Mar 10 11:42 422.html -rw-r--r-- 1 Justin Justin 947 Mar 10 11:43 500.html -rw-r--r-- 1 Justin Justin 61 Mar 20 11:01 blank_iframe.html -rwxr-xr-x 1 Justin Justin 479 Jan 18 13:13 dispatch.cgi -rwxr-xr-x 1 Justin Justin 861 Jan 18 13:13 dispatch.fcgi -rwxr-xr-x 1 Justin Justin 479 Jan 18 13:13 dispatch.rb -rw-r--r-- 1 Justin Justin 0 Jan 18 13:13 favicon.ico drwxr-xr-x 47 Justin Justin 1598 May 25 17:16 images drwxr-xr-x 18 Justin Justin 612 May 23 12:18 javascripts -rw-r--r-- 1 Justin Justin 204 Mar 10 11:43 robots.txt drwxr-xr-x 4 Justin Justin 136 Jan 18 13:13 sounds drwxr-xr-x 10 Justin Justin 340 May 25 18:52 stylesheets drwxrwxrwx 3 Justin Justin 102 Feb 21 20:07 uploads