Bug in Vista

Hola

Hi all

I recently migrate to Windows Vista. Now, to begin work allows me to run  
once Texify, then gives the error:

Texify falled to create dvi file. For possible...

In addition the _Runlog file indicates the following:

Output captured by WinEdt on lunes, mayo 5, 2008 at 19:21
------------------------------------------------------------------

WinEdt has successfully executed MiKTeX BibTeX accessory.

If BibTeX encountered and reported errors the resulting bbl file
may not appear properly displayed or in some cases may not be
created at all. For your convenience WinEdt captured output and
error files produced by the BibTeX accessory.

If there are problems (eg. if WinEdt displayed this file) read
this output carefully, fix any offending errors in your documents
and recompile your sources. If you are having troubles locating
and fixing errors please consult the extensive documentation
pertaining to BibTeX in MiKTeX Doc folder.

   Hint: WinEdt is almost certainly irrelevant to this situation!

------------------------------------------------------------------

No errors were reported during the execution of .
*** Error File is empty!

*** WinEdt captured the following console output:

This is BibTeX, Version 0.99c (MiKTeX 2.7)
The top-level auxiliary file: Artículo SW.aux
The style file: agsm.bst
Database file #1: orquestacion.bib

*** BibTeX produced the following log file "Artículo SW.blg":

This is BibTeX, Version 0.99cThe top-level auxiliary file: Artículo SW.aux
The style file: agsm.bst
Database file #1: orquestacion.bib

Moreover, I can run LaTeX and BibTeX wihtout problem and get the dvi file,  
good.

I did not have this problem in XP.

what might be wrong?

thanks

note: I use winedt 5.5, miktex 2.7, and now windows Vista  :(