Rosinstall issue in 3d_navigation

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Hi, I am trying to run 3d_navigation, (which the ros_wiki says is 'unreleased and contains experimental code').

1. When I am trying to rosinstall, it is giving me following errors.

-ahhhhhhhh, yaml parse error: expected '<document start="">', but found '<scalar>' in "<file>", line 6, column 19. Can anybody tell what might be missing ?

The tutorial says 'Use the following rosinstall to overlay your diamondback installation with the development versions of additional stacks and the 3d_navigation code

- svn:
    uri: https://code.ros.org/svn/wg-ros-pkg/branches/trunk_diamondback/sandbox/3d_navigation/
    local-name: stacks/3d_navigation
- svn:
    uri: https://alufr-ros-pkg.googlecode.com/svn/branches/octomap_mapping-experimental/
    local-name: stacks/octomap_mapping
- svn:
    uri: https://code.ros.org/svn/wg-ros-pkg/stacks/motion_planning_common/branches/arm_navigation_metrics
    local-name: stacks/motion_planning_common

How to use this in a rosinstall command? example please.....

-I tried to use it like:

$ rosinstall /opt/ros/diamonback https:/code.ros.org/svn/wg-ros-pkg/branches/trunk_diamondback/sandbox/3d_navigation/

(as the tutrial says: Usage: rosinstall PATH [URI] [options])

-my opt/ros/diamondback/.rosinstall file looks OK too. Here is its content

- other:
    local-name: /opt/ros/diamondback/ros
- other:
    local-name: /opt/ros/diamondback/stacks

Can anybody help me understand what is going wrong ?