Can't delete wordpress Plugin "MobilePres"

Please, i deactivated mobilepress plugin and i tried to delete it but all i get was.

Plugin could not be deleted due to an error: Could not fully remove the plugin(s) mobilepress/mobilepress.php.

and i tried deleting from cpanel, its not deleting even i tried uploading another theme inside the mobilepress folder, it was saying permission denied, even if i try renaming..