Configuration on security to allow modification on specific folder

it is a slight remote task where the following detail needs to be resolved. The SA-B2413DF44317\ASPNET account is not granted with Modify permission on folder c:\inetpub\wwwroot\Kentico<wbr style="font-size: 14px; font-family: 'Droid Serif', Georgia, 'Times New Roman', serif; line-height: 23px;" />CMS\. Although this is not an error, it's highly recommended that you configure these permissions. tried on c:\inetpub\wwwroot\KenticoCMS in iis's virtual directory, where properties has allowed 'read', 'write' and all, but still,