[R] Sweave: problem with usepackage{C:/PROGRA~1/R/R-27~1.0/share/texmf/Sweave}

[Lauri Nikkinen]

R users,

I'm at a loss with a problem considering running .tex files produced
by Sweave. When I run (R 2.7.0):
---------------------------------------------------
#Taken from ?Sweave
testfile <- system.file("Sweave", "Sweave-test-1.Rnw", package = "utils")

## enforce par(ask=FALSE)
options(device.ask.default=FALSE)

## create a LaTeX file
Sweave(testfile)
---------------------------------------------------

I get a .tex file:
----------------------------------------------------
% -*- mode: noweb; noweb-default-code-mode: R-mode; -*-
\documentclass[a4paper]{article}

\title{A Test File}
\author{Friedrich Leisch}


\usepackage{a4wide}

\usepackage{C:/PROGRA~1/R/R-27~1.0/share/texmf/Sweave}
\begin{document}

\maketitle

A simple example that will run in any S engine: The integers from 1 to
10 are
\begin{Schunk}
\begin{Soutput}
 [1]  1  2  3  4  5  6  7  8  9 10
\end{Soutput}
\end{Schunk}

We can also emulate a simple calculator:
…etc.
----------------------------------------------------------

When I run this file Latex  Pdf using MikTeX 2.7 and TeXnicCenter I
get an error message. I know that it has something to do with

\usepackage{C:/PROGRA~1/R/R-27~1.0/share/texmf/Sweave}

and '~' sign. How can I get pass this error?

Best
Lauri