Slic3r error (2 replies)

In previous post things became a little disjointed, so Im starting over making the problem more simplified.
I can navigate to the Slic3r folder and try to run slic3r and get the following error. Like I said Im a total noob so please be explicate with any helps, thanks.

dave@ubuntu-desktop:~/reprap/Software-master/slic3r$ ./slic3r.pl
Can't locate Boost/Geometry/Utils.pm in @INC (@INC contains: /home/dave/reprap/Software-master/slic3r/lib /etc/perl /usr/local/lib/perl/5.14.2 /usr/local/share/perl/5.14.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.14 /usr/share/perl/5.14 /usr/local/lib/site_perl .) at /home/dave/reprap/Software-master/slic3r/lib/Slic3r.pm line 32.
BEGIN failed--compilation aborted at /home/dave/reprap/Software-master/slic3r/lib/Slic3r.pm line 32.
Compilation failed in require at ./slic3r.pl line 16.
BEGIN failed--compilation aborted at ./slic3r.pl line 16.