problems with java.io and scala

I am a beginner in scala, and i tried to write this little programm:

import scala.io.Source

import java.io._

class Webpage(var adresse:String){

  def copy(datei:String){

    var text=new FileWriter(datei)

    var page=Source.fromURL(adresse)

    while(page.hasNext) text.write(page.next)

    text.close

  }
}

when i run this code in the console (scalac page.scala => scala page) it works quite well:

object page{
  def main(args: Array[String]):Unit={
    var page=new Webpage("http://www.schneidertraum.de/webshop/")
    page.copy("C:/Info/Page.html")
  }
}

But if I try to run it in IntelliJ i get the error

Exception in thread "main" java.nio.charset.MalformedInputException: Input length = 1
    at java.nio.charset.CoderResult.throwException(CoderResult.java:260)
    at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:319)
    at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:158)
    at java.io.InputStreamReader.read(InputStreamReader.java:167)
    at java.io.BufferedReader.fill(BufferedReader.java:136)
    at java.io.BufferedReader.read(BufferedReader.java:157)
    at scala.io.BufferedSource$$anonfun$1$$anonfun$apply$mcI$sp$1.apply$mcI$sp(BufferedSource.scala:28)
    at scala.io.Codec.wrap(Codec.scala:63)
    at scala.io.BufferedSource$$anonfun$1.apply(BufferedSource.scala:28)
    at scala.io.BufferedSource$$anonfun$1.apply(BufferedSource.scala:28)
    at scala.collection.Iterator$$anon$13.next(Iterator.scala:149)
    at scala.collection.Iterator$$anon$24.hasNext(Iterator.scala:484)
    at scala.collection.Iterator$$anon$19.hasNext(Iterator.scala:368)
    at scala.io.Source.hasNext(Source.scala:239)
    at Zettel_13.Webpage.copy(Webpage.scala:16)
    at Zettel_13.page$.main(page.scala:14)
    at Zettel_13.page.main(page.scala)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:115)

I readed that it has something to do with UTF8 and the java.io, but i have only a little bit understanding of this topic, and I would be thankfull if you could help me.

PS. With an other side it works in IntelliJ also:

  def main(args: Array[String]):Unit={
    var page=new Webpage("http://de.wikipedia.org/wiki/Last.fm")
    page.copy("C:/Info/Page.html")
  }
}

So it has something to do with the content of the sidecode
niratschi