Link 1
<http://www.iwaw.net/04/proceedings.php?f=Christensen>

Link 2
<http://bibnum.bnf.fr/ecdl/2003/proceedings.php?f=ecdl2003>

The above two links have the same formats except that they 
are residing on different domain. Both links retrieve PDF 
files. HTTrack did NOT capture the file from Link 1 but it 
managed to capture file from Link 2.

Can anybody give me a helping hand on this problem?
Thanks in advance.