He seguido las instrucciones del link "aquí" del primer mensaje (
http://blogs.iis.net/thomad/archive/...s-painful.aspx) y ahora me aparece este otro:
Active Server Pages error 'ASP 0131'
Disallowed Parent Path
/vgi/SubSecIncludes/Sub_IncludeParts/nav.asp, line 1
The Include file '../../SubSecIncludes/Jump_ICons.inc' cannot contain '..' to indicate the parent directory.
Ni idea, oye.