Spam Assassin problem during sa-update

[Been Told]

My Spam Assassin was throwing false errors because of the date bug described here:
http://www.faqforge.com/linux/how-to...ast_20xx-rule/

So I ran "/home/admispconfig/ispconfig/tools/spamassassin/usr/bin/sa-update" as described in the tutorial. But that gave me this output:

Can't locate LWP/UserAgent.pm in @INC (@INC contains: /home/admispconfig/ispconfig/tools/spamassassin/usr/share/perl/5.10.0 /etc/perl /usr/local/lib/perl/5.10.0 /usr/local/share/perl/5.10.0 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.10 /usr/share/perl/5.10 /usr/local/lib/site_perl) at /home/admispconfig/ispconfig/tools/spamassassin/usr/bin/sa-update line 79.
BEGIN failed--compilation aborted at /home/admispconfig/ispconfig/tools/spamassassin/usr/bin/sa-update line 79.

Any ideas anyone? The server is running on Debian Lenny, ISPConfig 2.

Also, sometimes when I write to someone and they reply to me, there's a "-->" just before my e-mail. This also happens when I send e-mail to myself. So it must be something on my server.