Install Of Perl Module

hi all, i am relative new perl programming and also new to linux platform, i am running ubuntu8.10.

i was running a freeware which contains a perl script.

it generate an error:

Use of uninitialized value $_[1] in join or string at /usr/lib/perl/5.10/IO/Socket/INET.pm line 117, <PPPD> line 1.

there is no such files in my directory of /usr/lib/perl/5.10/IO/
thus i went to install:

1)
sudo apt-get install libio-socket-inet6-perl

2)
sudo apt-get install libio-socket-multicast-perl

3)
sudo apt-get install libio-socket-ssl-perl

4)
went to cpan website to install
http://search.cpan.org/~gbarr/IO-1.25/

which this 4 option stated in my terminal that it had install /usr/lib/perl/5.10/IO/Socket/INET.pm

however when i reboot my pc and went to check in the /usr/lib/perl/5.10/ it is still not there. thus i not sure what is happening?

pls help.

any help will be greatly appreciated.