CPAN経由でNet::SFTPをインストールしたのですが、使用する際にエラーが出ます。。
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cpan> install Net::SFTP
CPAN: Storable loaded ok
Going to read /root/.cpan/Metadata
Database was generated on Sat, 16 Apr 2005 08:55:04 GMT
Net::SFTP is up to date.
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#perl -e 'use Net::SFTP;'
Can't locate Math/Pari.pm in @INC (@INC contains: /usr/lib/perl5/5.6.1/i386-linux /usr/lib/perl5/5.6.1 /usr/lib/perl5/site_perl/5.6.1/i
386-linux /usr/lib/perl5/site_perl/5.6.1 /usr/lib/perl5/site_perl/5.6.0/i386-linux /usr/lib/perl5/site_perl/5.6.0 /usr/lib/perl5/site_p
erl /usr/lib/perl5/vendor_perl/5.6.1/i386-linux /usr/lib/perl5/vendor_perl/5.6.1 /usr/lib/perl5/vendor_perl .) at /usr/lib/perl5/site_p
erl/5.6.1/Net/SSH/Perl/Util/SSH2MP.pm line 6.
BEGIN failed--compilation aborted at /usr/lib/perl5/site_perl/5.6.1/Net/SSH/Perl/Util/SSH2MP.pm line 6.
Compilation failed in require at /usr/lib/perl5/site_perl/5.6.1/Net/SSH/Perl/Util.pm line 56.
BEGIN failed--compilation aborted at /usr/lib/perl5/site_perl/5.6.1/Net/SFTP/Buffer.pm line 9.
Compilation failed in require at /usr/lib/perl5/site_perl/5.6.1/Net/SFTP/Attributes.pm line 7.
BEGIN failed--compilation aborted at /usr/lib/perl5/site_perl/5.6.1/Net/SFTP/Attributes.pm line 7.
Compilation failed in require at /usr/lib/perl5/site_perl/5.6.1/Net/SFTP.pm line 8.
BEGIN failed--compilation aborted at /usr/lib/perl5/site_perl/5.6.1/Net/SFTP.pm line 8.
Compilation failed in require at -e line 1.
BEGIN failed--compilation aborted at -e line 1.
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tarballからインストールしてもmake testで同様のエラーがでます。

どなたかご教示願えますでしょうか。