How to use sub-folder more than 3 levels?

[jaydezhou]

Thank you for your good job!
I try to use Raneto to manager my markdown files. When I use the sub-folder more than 3 levels,the 4th level sub-folder show as a link,but it only show 404 when i click it,and other sub-folders which they are deeper than 4 levels can't be show.

content	subfolder1	subfolder2	subfolder3	subfolder4	subfolder5
file0	file1	file2	file3	file4	file5
ok	ok	ok	ok	folder show as link,file is ok	folder and file can't show

So,how can I config raneto to use sub-folder more than 3 levels?