Problems with regarding changes in the svn

Hi, 
I have a little problem with our prijects on cruisecontrol. We want to check out our sources via cruisecontrol, when an modification was done. 
But cruisecontrol dont detect anything.
The config file is at the moment this one: 

<cruisecontrol>
  <project name="OfflineServer">
    <modificationset QuietPeriod="30">
      <svn Password="password" RepositoryLocation="servername" Username="username" />
    </modificationset>
    <schedule Interval="1">
      <ant BuildFile="projects/${project.name}/build.xml" target="compile"/>
    </schedule>
    <log LogDir="projects/${project.name}/target/test-results" />
    <publishers>
      <antpublisher />
    </publishers>
  </project>
</cruisecontrol>

THe attributes of <svn> are changed. Can anybody help us with this problem?
Greetings Joachim Sautter.

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