Sorry but I don't understand.

If I put the actual value of the path from the database (like PDF1.pdf), how will I get a pdf file from a different ID?

I made it!!!

I just droped MapPath and coded like this:

Dim RecID
Dim strPath
Dim ImagePath
ImagePath="c:\inetpub\wwwroot\pessoal\docs\"
RecID=Request.QueryString("id")
strPath = imagePath & RecID & ".pdf"
   Response.ClearContent()
   Response.ClearHeaders ()
   Response.ContentType = "application/pdf"
   Response.WriteFile(StrPath)
   Response.Flush()
   Response.Close()

I found the solution in here:
http://www.thescripts.com/forum/thread51090.html

Thanx anyway. You always help a lot!

C U