RH9下安装Mysql 5 server 出错

下载安装以下包.
前面3个都没有问题.
安装server包时出现问题:

MySQL-client-5.1.21-0.glibc23.i386.rpm
MySQL-devel-5.1.21-0.glibc23.i386.rpm
MySQL-shared-5.1.22-0.glibc23.i386.rpm
MySQL-server-5.1.21-0.glibc23.i386.rpm



提示:

warning: MySQL-server-5.1.21-0.glibc23.i386.rpm: V3 DSA signature: NOKEY, key ID 5072e1f5
error: Failed dependencies:
perl(DBI) is needed by MySQL-server-5.1.21-0.glibc23



#rpm -q perl
perl-5.8.0-88

我该怎么办?