Redmine

I can't use mnogosearch search engine with Redmine bacause Redmine puts documents in urls like:

http://myserver/redmine/attachments/*+2+*/myfile.pdf

This numeber (2) is a problem bacause in not a real directory, but is added by Redmine, so if I use this nmogosearch rule:

Server http://muserver/redmine/documents/ file:///var/lib/redmine/default/files/

in the search results I find:

http://myserver/redmine/documents/091103113553_myfile.pdf

In other words: the missing match between the filesystem path and the url generated cause such search engines to be useless.

Or maybe is my mistake because I do that in the wrong way?