[freeside] URI?

[ks at ksbase.com]

I got the admin interface up, but when I try to access any of the 
items, I get this:

Can't locate URI/URL.pm in @INC (@INC contains:
/usr/lib/perl5/5.6.1/i586-linux /usr/lib/perl5/5.6.1
/usr/lib/perl5/site_perl/5.6.1/i586-linux 
/usr/lib/perl5/site_perl/5.6.1
/usr/lib/perl5/site_perl/5.6.0 /usr/lib/perl5/site_perl) at
/usr/lib/perl5/site_perl/5.6.0/FS/CGI.pm line 7.
BEGIN failed--compilation aborted at
/usr/lib/perl5/site_perl/5.6.0/FS/CGI.pm line 7.
Compilation failed in require at
/var/www/html/www.ksbase.com/freeside/htdocs/edit/cust_main.cgi line 
136.
BEGIN failed--compilation aborted at 
/var/www/html/www.ksbase.com/freeside/htdocs/edit/cust_main.cgi line 
136.

What have I missed?

KS