Redmine

Hello, I have a problem using the /svn/extras/reposman.rb:

if I try to use
./reposman.rb --redmine myserver --svn-dir /var/svn --owner ... --key=..... --verbose

I get the following error:

Unable to connect to http://myserver: invalid character at "<?xml vers"

If I call directly myserver/sys/projects.json?key=....... I get something like:

<?xml version="1.0" encoding="UTF-8"?>
<projects type="array">
  <project>
    <created-on type="datetime">2011-10-08T16:31:37+02:00</created-on>
    <description></description>
    <homepage></homepage>
    <id type="integer">1</id>
    <identifier>test</identifier>

    <is-public type="boolean">false</is-public>
    <lft type="integer">1</lft>
    <name>test project</name>
    <parent-id type="integer" nil="true"></parent-id>
    <rgt type="integer">2</rgt>
    <status type="integer">1</status>

    <updated-on type="datetime">2011-10-08T16:31:37+02:00</updated-on>
    <repository>
      <id type="integer">1</id>
      <login></login>
      <password></password>
      <project-id type="integer">1</project-id>
      <root-url nil="true"></root-url>

      <url>..some..url..</url>
    </repository>
  </project>
</projects>

My Rubyversion is ruby 1.8.7, the Rails version is 2.3.11 and Redmine version is 1.2.1.stable.
according to http://www.redmine.org/projects/redmine/wiki/RedmineInstall this combination should be O.K.

Any Idea?