The below steps ensures that Config refresh timer service occurs.
1. Stop the Windows SharePoint Timer Service
2. Open C:\Documents and Settings\All Users\Application Data\Microsoft\SharePoint\Config\<<GUID>> folder
3. Take backup of Cache.ini file
4. Delete all the XML files in the GUID folder
5. Open the Cache.ini file in edit mode and delete the contents of it.
6. Type 1.Save and close the file.
7. Start the Windows SharePoint Timer Service.