i have followed this tutorial link text . problem encounters when i enter the rosmake command "rosmake collvoid navigation stack" . All goes fine till 86% , after that following error occurs

CMake Error at CMakeLists.txt:14 (message):

  Build of Stage failed

-- Configuring incomplete, errors occurred!

make[1]: *** [all] Error 1

make[1]: Leaving directory `/home/ittsel/fhuka/stage'

-------------------------------------------------------------------------------}

[ rosmake ] Output from build of package stage written to:

[ rosmake ] /home/ittsel/.ros/rosmake/rosmakeoutput-20130317-073110/stage/buildoutput.log

[rosmake-2] Finished <<< stage [FAIL] [ 70.92 seconds ]

[ rosmake ] Halting due to failure in package stage.

[ rosmake ] Waiting for other threads to complete.

[ rosmake ] Output from build of package costmap_2d written to: 62/76 Complete ]

[ rosmake ] /home/ittsel/.ros/rosmake/rosmakeoutput-20130317-073110/costmap2d/build_output.log

[rosmake-3] Finished <<< costmap_2d [PASS] [ 73.32 seconds ] -- WARNING: 5 compiler warnings

[ rosmake ] Results:

[ rosmake ] Built 64 packages with 1 failures.

[ rosmake ] Summary output to directory

[ rosmake ] /home/ittsel/.ros/rosmake/rosmake_output-20130317-073110

I,m using fuerte in 12.04 . am i doing anything wrong?