When you stuck why your configuration changes have no effect in Magento, try the following steps:
- make sure that you have applied changes for correct Configuration Scope / store / store view and there are no overrides on lower level (see how)
- Flush Magento cache at System > Cache Management
- rebuild indexes at System > Index Management
- Disable Magento compiler and clear compiled cache (details)
- flush PHP opcode cache (APC/XCache/eAccelerator)
- clear your browser caches
- forcibly reload page in your browser or try it from another browser / computer
- if this is related to image/css/js update: give a new name to the image/css/js file to pass through various CDN caches between webserver and your browser
Posted in: Configuration