求救呀！httpd的rpm包安装问题

我的系统是rhel4 as,  apr和apr-util已安装上了，
但在安装httpd-2.0.52.rpm和httpd-suexec-2.0.52的时候一直出问题，安装httpd的时候提示：
[root@loadfs ~]# rpm -ivh httpd-2.0.52-19.ent.i386.rpm
warning: httpd-2.0.52-19.ent.i386.rpm: V3 DSA signature: NOKEY, key ID db42a60e
error: Failed dependencies:
        httpd-suexec is needed by httpd-2.0.52-19.ent.i386
    Suggested resolutions:
        httpd-suexec-2.0.52-19.ent.i386.rpm
那就先安装httpd-suexec,但出现类似错误：
[root@loadfs ~]# rpm -ivh httpd-suexec-2.0.52-19.ent.i386.rpm
warning: httpd-suexec-2.0.52-19.ent.i386.rpm: V3 DSA signature: NOKEY, key ID db42a60e
error: Failed dependencies:
        httpd = 2.0.52-19.ent is needed by httpd-suexec-2.0.52-19.ent.i386
    Suggested resolutions:
        httpd-2.0.52-19.ent.i386.rpm
这个rpm包不管是先装谁都有依赖性错误，互相依赖对方。是不是少装什么其他的包了？
急啊！