[texhax] How can I insert a vertical spacing relative to upper page limit?

[Matthias F. Jütte]

Hi!

I am doing a titlepage using the titkepage-environment that is supposed to
have a certain amount of vertical spacing before the title is being
displayed. I tried to do that by using the \vspace-command, which works fine
in all later parts of the same page, but it appears to refuse to apply the
spacing when it is the first "output" on the page.

Here's the corresponding part of my document:

******

\begin{titlepage}
\doublespacing

\vspace{5cm} <-- doesn't work

\begin{center}
\textbf{\huge{<mytitle>}}

\vspace{3cm}

\onehalfspacing
<stuff>
\vspace{0.3cm} <-- this works
<stuff>
\vspace{0.3cm} <-- works as well

<more stuff and spacing>

\end{titlepage}

******

Any help would be appreciated.

TIA
Matthias