SVN logs into timesheet

I try to import SVN logs into timesheet on the following way:

1. Go to "timesheets" main menu
2. select "import SVN logs" submenu
3. fill in the following values in the "acces to svn server" section svn user: <my_svnusername> password: <my_svnpassword> svn url: https://<myhost>/<myrepository_root>

Then click on "find logs" button and the screen flickers a bit the no log at all. This same url works in the docs&tools/create a file storage, so I assume the svn server is ok, the connection is ok.

What can be the problem that does not allow to retrieve svn logs? (svn server is LDAP authenticated)