MiKTeX and proTeXt ⇒ problem with menu commands

[exuberant]

I recently installed MikTeX 2.7 and Emacs 22 on Vista.

Emacs+AucTeX and MikTeX work fine separately, but when I try to use menu commands LaTeX, view, pdfLaTeX, etc. I get the follwoing message.

Running `LaTeX' on `test' with ``latex \nonstopmode\input{test.tex}''

The compilation never terminates. Same with other commands. I have Emacs and MiKTeX 2.7 installed in c:\Program Files\

Any help would be appreciated.

Best,
Exuberant