On development, testing, and staging site you normally don't want Drupal's caching, and javascript/css aggregation features enabled.  Drop the following into your sites settings.php file to override these settings.

 
// disable performance caching
$conf['cache'] = 0;
$conf['block_cache'] = 0;
$conf['preprocess_css'] = 0;
$conf['preprocess_js'] = 0;