How to make transparent only one block in a slide

Question

I have two blocks on a slide. I simply want one block to be faded. I do not know why

 \setbeamercovered{transparent}

does not work.

Answer 1

This should work:

\documentclass{beamer}
\begin{document}

\begin{frame}{Frame1}
 \setbeamercovered{transparent}
     \begin{block}{Fade this}<0>
          Some block on first slide
     \end{block}
     \begin{block}{Don't fade this}<1>
       Some other block
     \end{block}
\end{frame}
\end{document}

Answer 2

Some thing like this?

\documentclass{beamer}
\begin{document}

\begin{frame}{Frame1}
 \setbeamercovered{transparent}
     \begin{block}{Fade this}<1>
          Some block on first slide
     \end{block}
     \begin{block}{Don't fade this}<1-2>
       Some other block
     \end{block}
\end{frame}
\end{document}