How to make SASS/SCSS Module works with Drupal 7? I've installed SASS/SCSS module within drupal seven... There is no configuration page apart from activating debug, and development mode. So, I thought there will be no other configuration needed. I've created my .sass files in the css directory... but nothing happens...

Could anyone helps?
You didn't mention whether you installed the PHamlP library or not and from your question description, it sounds like that is the problem -- it needs this to actually render your .sass files. From the readme:

1. Create a folder inside the SASS module (sites/all/modules/sass) and name it phamlp
2. Download PHamlP_3.2.zip from http://code.google.com/p/phamlp/downloads/list
3. Extract its contents to the phamlp folder you just created
4. Once you have installed/enabled the module you can visit admin/settings/sass where you can
configure various settings surrounding the behavior of this module.