Got error when I dpkg-reconfigure locales

[higeon <higeon@gmail.com>]

Got error when I dpkg-reconfigure locales
OS is debian 5.04 lenny
get the following error when I  dpkg-reconfigure locales
Can anyone help?

lenny:~# dpkg-reconfigure locales
debconf: Unable to load Debconf::Element::Dialog::Multiselect. Failed
because: Base class package "Debconf::Element::Multiselect" is empty.
   (Perhaps you need to 'use' the module which defines that package first,
   or make that module available in @INC (@INC contains: /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 /usr/share/perl5/Debconf/Element/Dialog/Multiselect.pm line 7
BEGIN failed--compilation aborted at
/usr/share/perl5/Debconf/Element/Dialog/Multiselect.pm line 7, <GEN1>
line 6.
Compilation failed in require at (eval 27) line 2, <GEN1> line 6.
BEGIN failed--compilation aborted at (eval 27) line 2, <GEN1> line 6.

Can't locate object method "new" via package
"Debconf::Element::Dialog::Multiselect" at
/usr/share/perl5/Debconf/FrontEnd.pm line 68, <GEN1> line 6.