have you upgraded your LaTeX dist lately? TeXnicCenter stores the
absolute paths to the executables, so if you installed a new MiKTeX then
those pahs are now wrong.
in one of the menus there is an item called 'output profiles', click it,
in the window that appears there is a button called wizzard. Run it, and
tell it where the executables are. In MiKTeX 2.7 it is something like
program files/MiKTeX 2.7/miktex/bin
--
/daleif (remove RTFSIGNATURE from email address)
LaTeX FAQ: http://www.tex.ac.uk/faq
LaTeX book: http://www.imf.au.dk/system/latex/bog/ (in Danish)
Remember to post minimal examples, see URL below
http://www.tex.ac.uk/cgi-bin/texfaq2html?label=minxampl
http://www.minimalbeispiel.de/mini-en.html