Dear, Imar
Really sorry about posting in another forum.
I tried to do every way include your suggestion. It didn't work. Sometimes I used same OS and same version (MX 2004 7.1) and same Database (Access XP) and same code, 2 machines was not the same (one did work and another didn't work).
Last Times before, I can use Server.Mappath in Dreamweaver MX 2004 smoothly. It didn't error. In my website
http://www.bus.mut.ac.th/board_com.asp
I use Server.Mappath to build this page via Dream MX 2004 too.
(sorry about my site, it 's thai language)