Hyperref in Yap, LyX 1.4.3-5,WindowsXP

[Sandor Szabo]

For internal links (e.g. in Table of Contents, in Index entries)
there are no links at all in Yap, I use Miktex2.5  .
However pdflatex does the right job.
In the same file in LyX 1.3.6-4 every link was live in Yap, in Miktex 
2.4.something.

Could you give me some hints?

Regards,
              Sandor