rpm installation and dependencies

[sasa]

Hi, I have a prboblem with Fedora Core 3 and spamassassin installation, when execute:

[root at test ~]# rpmbuild -tb Mail-SpamAssassin-3.0.4.tar.gz
error: Failed build dependencies:
        perl(Digest::SHA1) is needed by spamassassin-3.0.4-1.i386
[root at test ~]# cpan
Terminal does not support AddHistory.

cpan shell -- CPAN exploration and modules installation (v1.7601)
ReadLine support available (try 'install Bundle::CPAN')

cpan> install Digest::SHA1
CPAN: Storable loaded ok
Going to read /root/.cpan/Metadata
  Database was generated on Thu, 07 Jul 2005 21:03:59 GMT
Digest::SHA1 is up to date.

cpan> quit
Terminal does not support GetHistory.
Lockfile removed

..before of to install Mail-SpamAssassin I have installed Digest::SHA1, therefore because I have an error ??
thanks.

        Salvatore.