Accessing external file system files

I am getting files uploaded and into a directory inside RAILS_ROOT
called docstore. I want to provide a Download link to
http://localhost:3000/docstore/7/some_file.ext

The message I get is
Recognition failed for "/docstore/7/Accounting_Entries.xls"

Is this a routing issue? Routing is an area I have never really got
the hang of. How do I overcome this? All I want is that when the user
clicks on the Download link, he should be able to download the xls or
whatever document is being pointed to.

Regards,
Rajesh

Thanks Nelson... I went through the link and I dont see any probs
making it work. For sake of completion, I'll post actual results in
here tomorrow.

Rajesh