rgbdslam on electric :rosdep install failed

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Hi everybody I try to install rgbdslam on electric. My system is ubuntu11.10 32bit. when i type:

$ rosmake --rosdep-install rgbdslam

error occured:

[ rosmake ] rosdep install failed: Rosdep install failed

And it can't find octomap_server and octomap_ros .I don't know how to deal with it.Any suggestion is appreciated.thanks.

Error:

Failed to find rosdep octomap for package rgbdslam on OS:ubuntu version:oneiric

Failed to find stack for package [octomap_server]

Failed to load rosdep.yaml for package [octomap_server]:Cannot locate installation of package octomap_server: [rospack] couldn't find package [octomap_server]. 

ROS_ROOT[/opt/ros/electric/ros] 

ROS_PACKAGE_PATH[/home/administrator/ros:/home/administrator/ros:/opt/ros/electric/stacks]

Failed to find stack for package [octomap_ros]

Failed to load rosdep.yaml for package [octomap_ros]:Cannot locate installation of package octomap_ros: [rospack] couldn't find package [octomap_ros]. ROS_ROOT[/opt/ros/electric/ros] 

ROS_PACKAGE_PATH[/home/administrator/ros:/home/administrator/ros:/opt/ros/electric/stacks]

[ rosmake ] rosdep install failed: Rosdep install failed