i downloaded it again. even though same problem::

BusyBox v1.20.0 (Debian 1.20.0power1) built-in shell (ash)
Enter 'help' for a list of built-in commands.

/home/user # cd MyDocs/
/home/user/MyDocs # tar -xzvf applauncherd-launcher.tar.bz2
gzip: invalid magic
tar: Child returned status 1
tar: Exiting with failure status due to previous errors
/home/user/MyDocs # tar -xzvf libstdc\+\+6.tar.bz2
gzip: invalid magic
tar: Child returned status 1
tar: Exiting with failure status due to previous errors
/home/user/MyDocs #